Airworthiness Directives; The Boeing Company Airplanes

[Federal Register Volume 80, Number 206 (Monday, October 26, 2015)]
[Rules and Regulations]
[Pages 65121-65126]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2015-26983]



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Federal Register / Vol. 80, No. 206 / Monday, October 26, 2015 / 
Rules and Regulations

[[Page 65121]]



DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2015-4209; Directorate Identifier 2015-NM-156-AD; 
Amendment 39-18302; AD 2015-21-09]
RIN 2120-AA64


Airworthiness Directives; The Boeing Company Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule; request for comments.

-----------------------------------------------------------------------

SUMMARY: We are superseding Airworthiness Directive (AD) 2015-19-02 for 
all The Boeing Company Model 767 airplanes. AD 2015-19-02 required 
revising the maintenance or inspection program to include new 
airworthiness limitations. This AD continues to require a maintenance 
or inspection program revision, but with revised language. This AD was 
prompted by a determination that certain language in the airworthiness 
limitation was not accurate in AD 2015-19-02. We are issuing this AD to 
detect and correct latent failures of the fuel shutoff valve to the 
engine and auxiliary power unit (APU), which could result in the 
inability to shut off fuel to the engine and APU and, in case of 
certain fires, an uncontrollable fire that could lead to structural 
failure.

DATES: This AD is effective October 28, 2015.
    We must receive any comments on this AD by December 10, 2015.

ADDRESSES: You may send comments, using the procedures found in 14 CFR 
11.43 and 11.45, by any of the following methods:
    <bullet> Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the instructions for submitting comments.
    <bullet> Fax: 202-493-2251.
    <bullet> Mail: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue SE., Washington, DC 20590.
    <bullet> Hand Delivery: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue SE., Washington, DC 20590, between 9 a.m. and 5 p.m., 
Monday through Friday, except Federal holidays.

Examining the AD Docket

    You may examine the AD docket on the Internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2015-
4209; or in person at the Docket Management Facility between 9 a.m. and 
5 p.m., Monday through Friday, except Federal holidays. The AD docket 
contains this AD, the regulatory evaluation, any comments received, and 
other information. The street address for the Docket Office (phone: 
800-647-5527) is in the ADDRESSES section. Comments will be available 
in the AD docket shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Rebel Nichols, Aerospace Engineer, 
Propulsion Branch, ANM-140S, FAA, Seattle Aircraft Certification 
Office, 1601 Lind Avenue SW., Renton, WA 98057-3356; phone: 425-917-
6509; fax: 425-917-6590; email: [email protected].

SUPPLEMENTARY INFORMATION: 

Discussion

    On September 7, 2015, we issued AD 2015-19-02, Amendment 39-18265 
(80 FR 55512, September 16, 2015), for all The Boeing Company Model 767 
airplanes. AD 2015-19-02 required revising the maintenance or 
inspection program to include new airworthiness limitations. AD 2015-
19-02 resulted from reports of latently failed fuel shutoff valves 
discovered during fuel filter replacement. We issued AD 2015-19-02 to 
detect and correct latent failures of the fuel shutoff valve to the 
engine and APU, which could result in the inability to shut off fuel to 
the engine and APU and, in case of certain fires, an uncontrollable 
fire that could lead to structural failure.

Actions Since AD 2015-19-02, Amendment 39-18265 (80 FR 55512, September 
16, 2015), Was Issued

    Since we issued AD 2015-19-02, Amendment 39-18265 (80 FR 55512, 
September 16, 2015), we have determined that extraneous language was 
included in two locations of the text of the airworthiness limitations 
specified in AD 2015-19-02. In paragraph C.7.a. of the ``Description'' 
column of figure 1 to paragraph (g) of AD 2015-19-02, the text ``or the 
APU selector switch on the overhead panel is in the ON position'' is 
not relevant to the actions specified in that paragraph. In paragraph 
A.5. of the ``Description'' column of figure 3 to paragraph (g) of AD 
2015-19-02, the text ``the FUEL CONTROL switch is in the RUN position 
or'' is not relevant to the actions specified in that paragraph.
    We have determined that the language must be corrected to avoid any 
confusion in the paragraphs of the airworthiness limitation. We are 
issuing this AD to detect and correct latent failures of the fuel 
shutoff valve to the engine and APU, which could result in the 
inability to shut off fuel to the engine and APU and, in case of 
certain fires, an uncontrollable fire that could lead to structural 
failure.

FAA's Determination

    We are issuing this AD because we evaluated all the relevant 
information and determined the unsafe condition described previously is 
likely to exist or develop in other products of the same type design.

AD Requirements

    This AD requires revising the maintenance or inspection program to 
include new airworthiness limitations.

Interim Action

    We consider this AD interim action. The manufacturer is currently 
developing a modification that will address the unsafe condition 
identified in this AD. Once this modification is developed, approved, 
and available, we might consider additional rulemaking.

FAA's Justification and Determination of the Effective Date

    We are superseding AD 2015-19-02, Amendment 39-18265 (80 FR 55512, 
September 16, 2015), to correct inaccurate terminology in the

[[Page 65122]]

``Description'' column of figure 1 to paragraph (g) of AD 2015-19-02 
and figure 3 to paragraph (g) of AD 2015-19-02. We have made no other 
changes to the requirements published in AD 2015-19-02. We have 
determined that the changes impose no additional burden on any 
operator. Therefore, we find that notice and opportunity for prior 
public comment are unnecessary and that good cause exists for making 
this amendment effective in less than 30 days.

Comments Invited

    This AD is a final rule that involves requirements affecting flight 
safety, and we did not provide you with notice and an opportunity to 
provide your comments before it becomes effective. However, we invite 
you to send any written data, views, or arguments about this AD. Send 
your comments to an address listed under the ADDRESSES section. Include 
the Docket Number FAA-2015-4209 and Directorate Identifier 2015-NM-156-
AD at the beginning of your comments. We specifically invite comments 
on the overall regulatory, economic, environmental, and energy aspects 
of this AD. We will consider all comments received by the closing date 
and may amend this AD because of those comments.
    We will post all comments we receive, without change, to http://www.regulations.gov, including any personal information you provide. We 
will also post a report summarizing each substantive verbal contact we 
receive about this AD.

Costs of Compliance

    We estimate that this AD affects 450 airplanes of U.S. registry.
    We estimate the following costs to comply with this AD:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                     Cost per      Cost on U.S.
                Action                         Labor cost           Parts cost        product        operators
----------------------------------------------------------------------------------------------------------------
Incorporating Airworthiness Limitation  1 work-hour x $85 per                 $0             $85         $38,250
                                         hour = $85.
----------------------------------------------------------------------------------------------------------------

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's authority to 
issue rules on aviation safety. Subtitle I, Section 106, describes the 
authority of the FAA Administrator. Subtitle VII, Aviation Programs, 
describes in more detail the scope of the Agency's authority.
    We are issuing this rulemaking under the authority described in 
Subtitle VII, Part A, Subpart III, Section 44701, ``General 
requirements.'' Under that section, Congress charges the FAA with 
promoting safe flight of civil aircraft in air commerce by prescribing 
regulations for practices, methods, and procedures the Administrator 
finds necessary for safety in air commerce. This regulation is within 
the scope of that authority because it addresses an unsafe condition 
that is likely to exist or develop on products identified in this 
rulemaking action.

Regulatory Findings

    This AD will not have federalism implications under Executive Order 
13132. This AD will not have a substantial direct effect on the States, 
on the relationship between the national government and the States, or 
on the distribution of power and responsibilities among the various 
levels of government.
    For the reasons discussed above, I certify that this AD:
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866,
    (2) Is not a ``significant rule'' under DOT Regulatory Policies and 
Procedures (44 FR 11034, February 26, 1979),
    (3) Will not affect intrastate aviation in Alaska, and
    (4) Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

Adoption of the Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA amends part 39 of the Federal Aviation 
Regulations (14 CFR part 39) as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
1. The authority citation for part 39 continues to read as follows:

    Authority: 49 U.S.C. 106(g), 40113, 44701.


Sec.  39.13  [Amended]

0
2. The FAA amends Sec.  39.13 by removing Airworthiness Directive (AD) 
2015-19-02, Amendment 39-18265 (80 FR 55512, September 16, 2015), and 
adding the following new AD:

2015-21-09 The Boeing Company: Amendment 39-18302; Docket No. FAA-
2015-4209; Directorate Identifier 2015-NM-156-AD.

(a) Effective Date

    This AD is effective October 28, 2015.

(b) Affected ADs

    This AD replaces AD 2015-19-02, Amendment 39-18265 (80 FR 55512, 
September 16, 2015).

(c) Applicability

    This AD applies to all The Boeing Company Model 767-200, -300, -
300F, and -400ER series airplanes, certificated in any category.

(d) Subject

    Air Transport Association (ATA) of America Code 28, Fuel.

(e) Unsafe Condition

    This AD was prompted by reports of latently failed fuel shutoff 
valves discovered during fuel filter replacement. We are issuing 
this AD to detect and correct latent failures of the fuel shutoff 
valve to the engine and auxiliary power unit (APU), which could 
result in the inability to shut off fuel to the engine and APU and, 
in case of certain fires, an uncontrollable fire that could lead to 
structural failure.

(f) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.

(g) Revision of Maintenance or Inspection Program

    Within 30 days after the effective date of this AD, revise the 
maintenance or inspection program, as applicable, to add 
airworthiness limitation numbers 28-AWL-ENG, 28-AWL-MOV, and 28-AWL-
APU, by incorporating the information specified in figure 1, figure 
2, and figure 3 to paragraph (g) of this AD into the Airworthiness 
Limitations Section of the Instructions for Continued Airworthiness. 
The initial compliance time for accomplishing the actions specified 
in figure 1, figure 2, and figure 3 to paragraph (g) of this AD is 
within 10 days after accomplishing the maintenance or inspection 
program revision required by this paragraph.

[[Page 65123]]



      Figure 1 to Paragraph (g) of This AD: Engine Fuel Shutoff Valve (Fuel Spar Valve) Position Indication
                                                Operational Check
----------------------------------------------------------------------------------------------------------------
          AWL No.                Task            Interval            Applicability            Description
----------------------------------------------------------------------------------------------------------------
28-AWL-ENG................  ALI            DAILY...............  767-200, -300, and -  Engine Fuel Shutoff Valve
                                                                  300F airplanes.       (Fuel Spar Valve)
                                                                                        Position Indication
                                                                                        Operational Check.
                                           INTERVAL NOTE: The    APPLICABILITY NOTE:   Concern: The fuel spar
                                            operational check     Applies to            valve actuator design
                                            is not required on    airplanes with an     can result in airplanes
                                            days when the         actuator installed    operating with a failed
                                            airplane is not       at the engine fuel    fuel spar valve actuator
                                            used in revenue       spar valve position   that is not reported. A
                                            service.              having part number    latently failed fuel
                                           The check must be      (P/N) MA20A2027       spar valve actuator
                                            done before further   (S343T003-56) or P/   could prevent fuel
                                            flight once the       N MA30A1001           shutoff to an engine. In
                                            airplane is           (S343T003-66).        the event of certain
                                            returned to revenue                         engine fires, the
                                            service.                                    potential exists for an
                                                                                        engine fire to be
                                                                                        uncontrollable.
                                                                                       Perform one of the
                                                                                        following checks/
                                                                                        inspection of the fuel
                                                                                        spar valve position
                                                                                        (unless checked by the
                                                                                        flightcrew in a manner
                                                                                        approved by the
                                                                                        principal operations
                                                                                        inspector):
                                                                                       A. Operational Check
                                                                                        during engine shutdown.
                                                                                       1. Do an operational
                                                                                        check of the left engine
                                                                                        fuel spar valve
                                                                                        actuator.
                                                                                       a. As the L FUEL CONTROL
                                                                                        switch on the quadrant
                                                                                        control stand is moved
                                                                                        to the CUTOFF position,
                                                                                        verify the left SPAR
                                                                                        VALVE disagreement light
                                                                                        on the quadrant control
                                                                                        stand illuminates and
                                                                                        then goes off.
                                                                                       b. If the test fails
                                                                                        (light fails to
                                                                                        illuminate), before
                                                                                        further flight, repair
                                                                                        faults as required
                                                                                        (refer to Boeing
                                                                                        airplane maintenance
                                                                                        manual (AMM) 28-22-11).
                                                                                       2. Do an operational
                                                                                        check of the right
                                                                                        engine fuel spar valve
                                                                                        actuator.
                                                                                       a. As the R FUEL CONTROL
                                                                                        switch on the quadrant
                                                                                        control stand is moved
                                                                                        to the CUTOFF position,
                                                                                        verify the right SPAR
                                                                                        VALVE disagreement light
                                                                                        on the quadrant control
                                                                                        stand illuminates and
                                                                                        then goes off.
                                                                                       b. If the test fails
                                                                                        (light fails to
                                                                                        illuminate), before
                                                                                        further flight, repair
                                                                                        faults as required
                                                                                        (refer to Boeing AMM 28-
                                                                                        22-11).
                                                                                       B. Operational check
                                                                                        during engine start.
                                                                                       1. Do an operational
                                                                                        check of the left engine
                                                                                        fuel spar valve
                                                                                        actuator.
                                                                                       a. As the L FUEL CONTROL
                                                                                        switch on the quadrant
                                                                                        control stand is moved
                                                                                        to the RUN (or RICH)
                                                                                        position, verify the
                                                                                        left SPAR VALVE
                                                                                        disagreement light on
                                                                                        the quadrant control
                                                                                        stand illuminates and
                                                                                        then goes off.
                                                                                       b. If the test fails
                                                                                        (light fails to
                                                                                        illuminate), before
                                                                                        further flight, repair
                                                                                        faults as required
                                                                                        (refer to Boeing AMM 28-
                                                                                        22-11).
                                                                                       2. Do an operational
                                                                                        check of the right
                                                                                        engine fuel spar valve
                                                                                        actuator.
                                                                                       a. As the R FUEL CONTROL
                                                                                        switch on the quadrant
                                                                                        control stand is moved
                                                                                        to the RUN (or RICH)
                                                                                        position, verify the
                                                                                        right SPAR VALVE
                                                                                        disagreement light on
                                                                                        the quadrant control
                                                                                        stand illuminates and
                                                                                        then goes off.
                                                                                       b. If the test fails
                                                                                        (light fails to
                                                                                        illuminate), before
                                                                                        further flight, repair
                                                                                        faults as required
                                                                                        (refer to Boeing AMM 28-
                                                                                        22-11).
                                                                                       C. Operational check
                                                                                        without engine
                                                                                        operation.
                                                                                       1. Supply electrical
                                                                                        power to the airplane
                                                                                        using standard
                                                                                        practices.
                                                                                       2. Make sure all fuel
                                                                                        pump switches on the
                                                                                        Overhead Panel are in
                                                                                        the OFF position.
                                                                                       3. If the auxiliary power
                                                                                        unit (APU) is running,
                                                                                        open and collar the L
                                                                                        FWD FUEL BOOST PUMP
                                                                                        (C00372) circuit breaker
                                                                                        on the Main Power
                                                                                        Distribution Panel.
                                                                                       4. Make sure LEFT and
                                                                                        RIGHT ENG FIRE switches
                                                                                        on the Aft Aisle Stand
                                                                                        are in the NORMAL (IN)
                                                                                        position.
                                                                                       5. Make sure L and R ENG
                                                                                        START Selector Switches
                                                                                        on the Overhead Panel,
                                                                                        are in the OFF position.
                                                                                       6. Do an operational
                                                                                        check of the left engine
                                                                                        fuel spar valve
                                                                                        actuator.

[[Page 65124]]

 
                                                                                       a. Move L FUEL CONTROL
                                                                                        switch on the quadrant
                                                                                        control stand to the RUN
                                                                                        position and wait
                                                                                        approximately 10
                                                                                        seconds.
                                                                                       NOTE: It is normal under
                                                                                        this test condition for
                                                                                        the ENG VALVE
                                                                                        disagreement light on
                                                                                        the quadrant control
                                                                                        stand to stay
                                                                                        illuminated.
                                                                                       b. Move L FUEL CONTROL
                                                                                        switch on the quadrant
                                                                                        control stand to the
                                                                                        CUTOFF position.
                                                                                       c. Verify the left SPAR
                                                                                        VALVE disagreement light
                                                                                        on the quadrant control
                                                                                        stand illuminates and
                                                                                        then goes off.
                                                                                       d. If the test fails
                                                                                        (light fails to
                                                                                        illuminate), before
                                                                                        further flight, repair
                                                                                        faults as required
                                                                                        (refer to Boeing AMM 28-
                                                                                        22-11).
                                                                                       7. Do an operational
                                                                                        check of the right
                                                                                        engine fuel spar valve
                                                                                        actuator.
                                                                                       a. Move R FUEL CONTROL
                                                                                        switch on the quadrant
                                                                                        control stand to the RUN
                                                                                        position and wait
                                                                                        approximately 10 seconds
                                                                                        once the FUEL CONTROL
                                                                                        switch is in the RUN
                                                                                        position.
                                                                                       NOTE: It is normal under
                                                                                        this test condition for
                                                                                        the ENG VALVE
                                                                                        disagreement light on
                                                                                        the quadrant control
                                                                                        stand to stay
                                                                                        illuminated.
                                                                                       b. Move R FUEL CONTROL
                                                                                        switch on the quadrant
                                                                                        control stand to the
                                                                                        CUTOFF position.
                                                                                       c. Verify the right SPAR
                                                                                        VALVE disagreement light
                                                                                        on the quadrant control
                                                                                        stand illuminates and
                                                                                        then goes off.
                                                                                       d. If the test fails
                                                                                        (light fails to
                                                                                        illuminate), before
                                                                                        further flight, repair
                                                                                        faults as required
                                                                                        (refer to Boeing AMM 28-
                                                                                        22-11).
                                                                                       8. If the L FWD FUEL
                                                                                        BOOST PUMP circuit
                                                                                        breaker was collared in
                                                                                        step 3, remove collar
                                                                                        and close.
                                                                                       D. Perform an inspection
                                                                                        of the fuel spar valve
                                                                                        actuator position.
                                                                                       NOTE: This inspection may
                                                                                        be most useful whenever
                                                                                        the SPAR VALVE light
                                                                                        does not function
                                                                                        properly.
                                                                                       1. Make sure the L FUEL
                                                                                        CONTROL switch on the
                                                                                        quadrant control stand
                                                                                        is in the CUTOFF
                                                                                        position.
                                                                                       NOTE: It is not necessary
                                                                                        to cycle the FUEL
                                                                                        CONTROL switch to do
                                                                                        this inspection.
                                                                                       2. Inspect the left
                                                                                        engine fuel spar valve
                                                                                        actuator located in the
                                                                                        left rear spar.
                                                                                       NOTE: The Fuel Spar Valve
                                                                                        actuators are located
                                                                                        behind main gear doors
                                                                                        on the rear spar.
                                                                                       a. Verify the manual
                                                                                        override handle on the
                                                                                        engine fuel spar valve
                                                                                        actuator is in the
                                                                                        CLOSED position.
                                                                                       b. Repair or replace any
                                                                                        fuel spar valve actuator
                                                                                        that is not in the
                                                                                        CLOSED position (refer
                                                                                        to Boeing AMM 28-22-11).
                                                                                       3. Make sure the R FUEL
                                                                                        CONTROL switch on the
                                                                                        quadrant control stand
                                                                                        is in the CUTOFF
                                                                                        position.
                                                                                       NOTE: It is not necessary
                                                                                        to cycle the FUEL
                                                                                        CONTROL switch to do
                                                                                        this inspection.
                                                                                       4. Inspect the right
                                                                                        engine fuel spar valve
                                                                                        actuator located in the
                                                                                        right rear spar.
                                                                                       NOTE: The Fuel Spar Valve
                                                                                        actuators are located
                                                                                        behind main gear doors
                                                                                        on the rear spar.
                                                                                       a. Verify the manual
                                                                                        override handle on the
                                                                                        engine fuel spar valve
                                                                                        actuator is in the
                                                                                        CLOSED position.
                                                                                       b. Repair or replace any
                                                                                        fuel spar valve actuator
                                                                                        that is not in the
                                                                                        CLOSED position (refer
                                                                                        to Boeing AMM 28-22-11).
----------------------------------------------------------------------------------------------------------------


[[Page 65125]]


      Figure 2 to Paragraph (g) of This AD: Engine Fuel Shutoff Valve (Fuel Spar Valve) Actuator Inspection
----------------------------------------------------------------------------------------------------------------
          AWL No.                Task            Interval            Applicability            Description
----------------------------------------------------------------------------------------------------------------
28[dash]AWL[dash]MOV......  ALI            10 DAYS.............  767-400ER series      Engine Fuel Shutoff Valve
                                                                  airplanes.            (Fuel Spar Valve)
                                                                                        Actuator Inspection.
                                           INTERVAL NOTE: The    APPLICABILITY NOTE:   Concern: The fuel spar
                                            inspection is not     Applies to            valve actuator design
                                            required on days      airplanes with an     can result in airplanes
                                            when the airplane     actuator installed    operating with a failed
                                            is not used in        at the engine fuel    fuel spar valve actuator
                                            revenue service.      spar valve position   that is not reported. A
                                           The inspection must    having part number    latently failed fuel
                                            be done before        (P/N) MA20A2027       spar valve actuator
                                            further flight if     (S343T003-56) or P/   would prevent fuel
                                            it has been 10 or     N MA30A1001           shutoff to an engine. In
                                            more calendar days    (S343T003-66).        the event of certain
                                            since last                                  engine fires, the
                                            inspection.                                 potential exists for an
                                                                                        engine fire to be
                                                                                        uncontrollable.
                                                                                       Perform an inspection of
                                                                                        the fuel spar valve
                                                                                        actuator position.
                                                                                       NOTE: The fuel spar valve
                                                                                        actuators are located
                                                                                        behind main gear doors
                                                                                        on the rear spar.
                                                                                       1. Make sure the L FUEL
                                                                                        CONTROL switch on the
                                                                                        quadrant control stand
                                                                                        is in the CUTOFF
                                                                                        position.
                                                                                       NOTE: It is not necessary
                                                                                        to cycle the FUEL
                                                                                        CONTROL switch to do
                                                                                        this inspection.
                                                                                       2. Inspect the left
                                                                                        engine fuel spar valve
                                                                                        actuator located in the
                                                                                        left rear spar.
                                                                                       a. Verify the manual
                                                                                        override handle on the
                                                                                        engine fuel spar valve
                                                                                        actuator is in the
                                                                                        CLOSED position.
                                                                                       b. Repair or replace any
                                                                                        fuel spar valve actuator
                                                                                        that is not in the
                                                                                        CLOSED position (refer
                                                                                        to Boeing AMM 28-22-11).
                                                                                       3. Make sure the R FUEL
                                                                                        CONTROL switch on the
                                                                                        quadrant control stand
                                                                                        is in the CUTOFF
                                                                                        position.
                                                                                       NOTE: It is not necessary
                                                                                        to cycle the FUEL
                                                                                        CONTROL switch to do
                                                                                        this inspection.
                                                                                       4. Inspect the right
                                                                                        engine fuel spar valve
                                                                                        actuator located in the
                                                                                        right rear spar.
                                                                                       a. Verify the manual
                                                                                        override handle on the
                                                                                        engine fuel spar valve
                                                                                        actuator is in the
                                                                                        CLOSED position.
                                                                                       b. Repair or replace any
                                                                                        fuel spar valve actuator
                                                                                        that is not in the
                                                                                        CLOSED position (refer
                                                                                        to Boeing AMM 28-22-11).
----------------------------------------------------------------------------------------------------------------


     Figure 3 to Paragraph (g) of This AD: Auxiliary Power Unit (APU) Fuel Shutoff Valve Position Indication
                                                Operational Check
----------------------------------------------------------------------------------------------------------------
          AWL No.                Task            Interval            Applicability            Description
----------------------------------------------------------------------------------------------------------------
28-AWL-APU................  ALI            10 DAYS.............  ALL.................  APU Fuel Shutoff Valve
                                                                                        Position Indication
                                                                                        Operational Check.
                                           INTERVAL NOTE: The    APPLICABILITY NOTE:   Concern: The APU fuel
                                            operational check     Applies to            shutoff valve actuator
                                            is not required on    airplanes with an     design can result in
                                            days when the         actuator installed    airplanes operating with
                                            airplane is not       at the APU fuel       a failed APU fuel
                                            used in revenue       shutoff valve         shutoff valve actuator
                                            service. The          position having       that is not reported. A
                                            operational check     part number (P/N)     latently failed APU fuel
                                            must be done before   MA20A2027 (S343T003-  shutoff valve actuator
                                            further flight with   56) or MA30A1001      could prevent fuel
                                            an operational APU    (S343T003-66).        shutoff to the APU. In
                                            if it has been 10                           the event of certain APU
                                            or more calendar                            fires, the potential
                                            days since last                             exists for an APU fire
                                            check.                                      to be uncontrollable
                                                                                       Perform the operational
                                                                                        check of the APU fuel
                                                                                        shutoff valve position
                                                                                        indication (unless
                                                                                        checked by the
                                                                                        flightcrew in a manner
                                                                                        approved by the
                                                                                        principal operations
                                                                                        inspector).
                                                                                       A. Do an operational
                                                                                        check of the APU fuel
                                                                                        shutoff valve position
                                                                                        indication.
                                                                                       1. If the APU is running,
                                                                                        unload and shut down the
                                                                                        APU using standard
                                                                                        practices.
                                                                                       2. Supply electrical
                                                                                        power to the airplane
                                                                                        using standard
                                                                                        practices.
                                                                                       3. Make sure the APU FIRE
                                                                                        switch on the Aft Aisle
                                                                                        Stand is in the NORMAL
                                                                                        (IN) position.
                                                                                       4. Make sure there is at
                                                                                        least 1,000 lbs (500
                                                                                        kgs) of fuel in the Left
                                                                                        Main Tank.
                                                                                       5. Move APU Selector
                                                                                        switch on the Overhead
                                                                                        Panel to the ON position
                                                                                        and wait approximately
                                                                                        10 seconds once the APU
                                                                                        selector switch on the
                                                                                        overhead panel is in the
                                                                                        ON position.
                                                                                       6. Move the APU Selector
                                                                                        switch on the Overhead
                                                                                        Panel to the OFF
                                                                                        position.

[[Page 65126]]

 
                                                                                       7. Verify the APU FAULT
                                                                                        light on the Overhead
                                                                                        Panel illuminates and
                                                                                        then goes off.
                                                                                       8. If the test fails
                                                                                        (light fails to
                                                                                        illuminate), before
                                                                                        further flight requiring
                                                                                        APU availability, repair
                                                                                        faults as required
                                                                                        (refer to Boeing AMM 28-
                                                                                        25-02).
                                                                                       NOTE: Dispatch may be
                                                                                        permitted per MMEL 28-25-
                                                                                        02 if APU is not
                                                                                        required for flight.
----------------------------------------------------------------------------------------------------------------

(h) No Alternative Actions or Intervals

    After accomplishment of the maintenance or inspection program 
revision required by paragraph (g) of this AD, no alternative 
actions (e.g., inspections) or intervals may be used unless the 
actions or intervals are approved as an alternative method of 
compliance (AMOC) in accordance with the procedures specified in 
paragraph (i)(1) of this AD.

(i) Alternative Methods of Compliance (AMOCs)

    (1) The Manager, Seattle Aircraft Certification Office (ACO) 
FAA, has the authority to approve AMOCs for this AD, if requested 
using the procedures found in 14 CFR 39.19. In accordance with 14 
CFR 39.19, send your request to your principal inspector or local 
Flight Standards District Office, as appropriate. If sending 
information directly to the manager of the ACO, send it to the 
attention of the person identified in paragraph (j) of this AD. 
Information may be emailed to: [email protected].
    (2) Before using any approved AMOC, notify your appropriate 
principal inspector, or lacking a principal inspector, the manager 
of the local flight standards district office/certificate holding 
district office.

(j) Related Information

    For more information about this AD, contact Rebel Nichols, 
Aerospace Engineer, Propulsion Branch, ANM-140S, FAA, Seattle 
Aircraft Certification Office, 1601 Lind Avenue SW., Renton, WA 
98057-3356; phone: 425-917-6509; fax: 425-917-6590; email: 
[email protected].

(k) Material Incorporated by Reference

    None.

    Issued in Renton, Washington, on October 16, 2015.
Jeffrey E. Duven,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2015-26983 Filed 10-23-15; 8:45 am]
 BILLING CODE 4910-13-P

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