Airworthiness Directives; Cessna Model 750 Airplanes

[Federal Register Volume 71, Number 224 (Tuesday, November 21, 2006)]
[Rules and Regulations]
[Pages 67295-67297]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: E6-19439]



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Federal Register / Vol. 71, No. 224 / Tuesday, November 21, 2006 / 
Rules and Regulations

[[Page 67295]]



DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2006-26352; Directorate Identifier 2006-NM-231-AD; 
Amendment 39-14830; AD 2006-24-01]
Airworthiness Directives; Cessna Model 750 Airplanes
AGENCY: Federal Aviation Administration (FAA), Department of 
Transportation (DOT).

ACTION: Final rule; request for comments.

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

SUMMARY: The FAA is superseding an existing airworthiness directive 
(AD) that applies to certain Cessna Model 750 airplanes. The existing 
AD currently requires repetitive inspections for clearance and chafing 
of an auxiliary power unit (APU) fuel tube assembly in the tail cone 
area of the airplane, and corrective actions if necessary. For certain 
airplanes, the existing AD also requires replacing the APU fuel line. 
This new AD adds airplanes to the applicability and allows operators to 
modify the APU fuel line by installing new fuel lines, fairleads, and 
clamping configurations, which is an optional terminating action for 
the repetitive inspections. This AD results from reports of chafed APU 
fuel tubes leaking into the tail cone area due to interference between 
the fuel tube assembly and elevator flight control cables, hydraulic 
lines, and high-temperature bleed air couplings. We are issuing this AD 
to detect and correct this interference, which could result in chafing, 
fuel leaking into an area where ignition sources are present, and 
possible fire in an area without fire detection or extinguishing 
provisions.

DATES: This AD becomes effective December 6, 2006.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in the AD as of December 6, 
2006.
    On May 10, 2005 (70 FR 21139, April 25, 2005), the Director of the 
Federal Register approved the incorporation by reference of Cessna 
Alert Service Letter ASL750-49-09, Revision 2, dated March 10, 2005; 
and Cessna Service Bulletin SB750-49-05, Revision 1, dated January 17, 
2000.
    We must receive any comments on this AD by January 22, 2007.

ADDRESSES: Use one of the following addresses to submit comments on 
this AD.
    <bullet> DOT Docket Web site: Go to http://dms.dot.gov and follow 
the instructions for sending your comments electronically.
    <bullet> Government-wide rulemaking Web site: Go to http://www.regulations.gov and follow the instructions for sending your 
comments electronically.
    <bullet> Mail: Docket Management Facility; U.S. Department of 
Transportation, 400 Seventh Street, SW., Nassif Building, Room PL-401, 
Washington, DC 20590.
    <bullet> Fax: (202) 493-2251.
    <bullet> Hand Delivery: Room PL-401 on the plaza level of the 
Nassif Building, 400 Seventh Street, SW., Washington, DC, between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
    Contact Cessna Aircraft Co., P.O. Box 7706, Wichita, Kansas 67277, 
for service information identified in this AD.

FOR FURTHER INFORMATION CONTACT: Robert D. Adamson, Aerospace Engineer, 
Mechanical Systems and Propulsion Branch, ACE-116W, FAA, Wichita 
Aircraft Certification Office, 1801 Airport Road, Room 100, Mid-
Continent Airport, Wichita, Kansas 67209; telephone (316) 946-4145; fax 
(316) 946-4107.

SUPPLEMENTARY INFORMATION:

Discussion

    On April 13, 2005, we issued AD 2005-09-01, amendment 39-14069 (70 
FR 21139, April 25, 2005). That AD applies to certain Cessna Model 750 
airplanes. That AD requires repetitive inspections for clearance and 
chafing of an auxiliary power unit (APU) fuel tube assembly in the tail 
cone area of the airplane, and corrective actions if necessary. For 
certain airplanes, that AD also requires replacing the APU fuel line. 
That AD resulted from reports of chafed APU fuel tubes leaking into the 
tail cone area due to interference between the fuel tube assembly and 
elevator flight control cables, hydraulic lines, and high-temperature 
bleed air couplings. The actions specified in that AD are intended to 
detect and correct this interference, which could result in chafing, 
fuel leaking into an area where ignition sources are present, and 
possible fire in an area without fire detection or extinguishing 
provisions.

Actions Since AD Was Issued

    Since we issued that AD, the manufacturer has reported that 
additional airplanes are subject to the existing requirements in AD 
2005-09-01.
    The preamble to AD 2005-09-01 specified that we considered the 
requirements ``interim action'' and that the manufacturer was 
developing a modification to address the unsafe condition. The 
manufacturer now has developed a modification.

Relevant Service Information

    We have reviewed Cessna Service Bulletin SB750-49-12, Revision 1, 
dated August 3, 2006. The service bulletin describes procedures for 
modifying the APU fuel line by installing new fuel lines, fairleads, 
and clamping configurations.

FAA's Determination and Requirements of This AD

    The unsafe condition described previously is likely to exist or 
develop on other airplanes of the same type design. For this reason, we 
are issuing this AD to supersede AD 2005-09-01. This new AD retains the 
requirements of the existing AD. This AD also adds airplanes to the 
applicability and allows operators to modify the APU fuel line by 
installing new fuel lines, fairleads, and clamping configurations, 
which is an optional terminating action for the repetitive inspections 
in the existing AD.

No Maintenance Transaction Report

    Although Cessna Service Bulletin SB750-49-12, Revision 1, specifies 
to submit a maintenance transaction report to the manufacturer, this AD 
does not include that requirement.

[[Page 67296]]

Interim Action

    We consider this AD interim action. We are currently considering 
requiring the modification, which would constitute terminating action 
for the repetitive inspections required by this AD. However, the 
planned compliance time for the installation of the modification would 
allow enough time to provide notice and opportunity for prior public 
comment on the merits of the modification.

Clarification of Alternative Method of Compliance (AMOC) Paragraph

    We have revised this action to clarify the appropriate procedure 
for notifying the principal inspector before using any approved AMOC on 
any airplane to which the AMOC applies.

FAA's Determination of the Effective Date

    An unsafe condition exists that requires the immediate adoption of 
this AD; therefore, providing notice and opportunity for public comment 
before the AD is issued is impracticable, and good cause exists to make 
this AD effective in less than 30 days.

Comments Invited

    This AD is a final rule that involves requirements that affect 
flight safety and was not preceded by notice and an opportunity for 
public comment; however, we invite you to submit any relevant written 
data, views, or arguments regarding this AD. Send your comments to an 
address listed in the ADDRESSES section. Include ``Docket No. FAA-2006-
26352; Directorate Identifier 2006-NM-231-AD'' at the beginning of your 
comments. We specifically invite comments on the overall regulatory, 
economic, environmental, and energy aspects of the AD that might 
suggest a need to modify it.
    We will post all comments we receive, without change, to http://dms.dot.gov, including any personal information you provide. We will 
also post a report summarizing each substantive verbal contact with FAA 
personnel concerning this AD. Using the search function of that Web 
site, anyone can find and read the comments in any of our dockets, 
including the name of the individual who sent the comment (or signed 
the comment on behalf of an association, business, labor union, etc.). 
You may review the DOT's complete Privacy Act Statement in the Federal 
Register published on April 11, 2000 (65 FR 19477-78), or you may visit 
http://dms.dot.gov.

Examining the Docket

    You may examine the AD docket on the Internet at http://dms.dot.gov, or in person at the Docket Management Facility office 
between 9 a.m. and 5 p.m., Monday through Friday, except Federal 
holidays. The Docket Management Facility office (telephone (800) 647-
5227) is located on the plaza level of the Nassif Building at the DOT 
street address stated in the ADDRESSES section. Comments will be 
available in the AD docket shortly after the Docket Management System 
receives them.

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

    We have determined that 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 the regulation:
    1. Is not a ``significant regulatory action'' under Executive Order 
12866;
    2. Is not a ``significant rule'' under the DOT Regulatory Policies 
and Procedures (44 FR 11034, February 26, 1979); and
    3. 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.
    We prepared a regulatory evaluation of the estimated costs to 
comply with this AD and placed it in the AD docket. See the ADDRESSES 
section for a location to examine the regulatory evaluation.

List of Subjects in 14 CFR Part 39

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

Adoption of the Amendment

0
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 Federal Aviation Administration (FAA) amends Sec.  39.13 by 
removing amendment 39-14069 (70 FR 21139, April 25, 2005) and adding 
the following new airworthiness directive (AD):

2006-24-01 Cessna Aircraft Company: Docket No. FAA-2006-26352; 
Directorate Identifier 2006-NM-231-AD; Amendment 39-14830.

Effective Date

    (a) This AD becomes effective December 6, 2006.

Affected ADs

    (b) This AD supersedes AD 2005-09-01.

Applicability

    (c) This AD applies to Cessna Model 750 airplanes, certificated 
in any category, serial numbers -0001 through -0256 inclusive.

Unsafe Condition

    (d) This AD results from reports of chafed auxiliary power unit 
(APU) fuel tubes leaking into the tail cone area due to interference 
between the fuel tube assembly and elevator flight control cables, 
hydraulic lines, and high-temperature bleed air couplings. We are 
issuing this AD to detect and correct this interference, which could 
result in chafing, fuel leaking into an area where ignition sources 
are present, and possible fire in an area without fire detection or 
extinguishing provisions.

Compliance

    (e) You are responsible for having the actions required by this 
AD performed within the compliance times specified, unless the 
actions have already been done.

Restatement of the Requirements of AD 2005-09-01

Inspections

    (f) For airplanes with a serial number -0001 through -0240 
inclusive: Within 25 flight hours or 48 days, whichever occurs 
first, after May 10, 2005 (the effective date of AD 2005-09-01), do 
a detailed inspection to verify the clearance and detect chafing of 
one of the APU fuel tube assemblies in the tail

[[Page 67297]]

cone area of the airplane due to interference between the APU fuel 
tube and elevator flight control cables, hydraulic lines, and high 
temperature bleed air couplings. Do the actions in accordance with 
the Accomplishment Instructions of Cessna Alert Service Letter (ASL) 
ASL750-49-09, Revision 2, dated March 10, 2005. Do applicable 
corrective actions before further flight in accordance with the ASL. 
Repeat the inspection thereafter at the earlier of the times 
specified in paragraphs (f)(1) and (f)(2) of this AD.
    (1) At intervals not to exceed 250 flight hours or 3 months, 
whichever occurs first.
    (2) Before further flight after access to the inspection area 
for any other inspection or maintenance.


    Note 1: For the purposes of this AD, a detailed inspection is: 
``An intensive examination of a specific item, installation, or 
assembly to detect damage, failure, or irregularity. Available 
lighting is normally supplemented with a direct source of good 
lighting at an intensity deemed appropriate. Inspection aids such as 
mirror, magnifying lenses, etc., may be necessary. Surface cleaning 
and elaborate procedures may be required.''

APU Fuel Line Replacement

    (g) For airplanes having serial numbers -0001 through -0031 
inclusive and -0033 through -0107 inclusive: Before the first 
inspection required by paragraph (f) of this AD, replace the APU 
fuel tube in the tail cone area of the airplane, in accordance with 
Cessna Service Bulletin SB750-49-05, Revision 1, dated January 17, 
2000. The replacement APU fuel tube must be a new APU fuel tube 
having part number 6756605-23.

Report

    (h) For airplanes with serial numbers -0001 through -0240 
inclusive: At the applicable time specified in paragraph (h)(1) or 
(h)(2) of this AD, report the results (both positive and negative 
findings) of the initial inspection required by paragraph (f) of 
this AD, in accordance with Cessna ASL ASL750-49-09, Revision 2, 
dated March 10, 2005. Information collection requirements contained 
in this AD have been approved by the Office of Management and Budget 
(OMB) under the provisions of the Paperwork Reduction Act of 1980 
(44 U.S.C. 3501 et seq.) and have been assigned OMB Control Number 
2120-0056.
    (1) If the inspection is done after the May 10, 2005: Submit the 
report within 30 days after the inspection.
    (2) If the inspection was done before May 10, 2005: Submit the 
report within 30 days after May 10, 2005.

New Requirements of This AD

Inspections for Additional Airplanes

    (i) For airplanes with serial numbers -0241 through -0256 
inclusive, within 25 flight hours or 48 days, whichever occurs 
first, after the effective date of this AD: Do the inspection 
required by paragraph (f) of this AD. Do applicable corrective 
actions before further flight in accordance with the Accomplishment 
Instructions of Cessna Alert Service Letter (ASL) ASL750-49-09, 
Revision 2, dated March 10, 2005. Repeat the inspection thereafter 
at the earlier of the times specified in paragraphs (f)(1) and 
(f)(2) of this AD.

Report for Additional Airplanes

    (j) For airplanes with serial numbers -0241 through -0256 
inclusive: At the applicable time specified in paragraph (j)(1) or 
(j)(2) of this AD, do the action required by paragraph (h) of this 
AD.
    (1) If the inspection required by paragraph (i) of this AD is 
done on or after the effective date of this AD: Submit the report 
within 30 days after the inspection.
    (2) If the inspection required by paragraph (i) of this AD was 
done before the effective date of this AD: Submit the report within 
30 days after the effective date of this AD.

Optional Terminating Action

    (k) Modifying the APU fuel line by installing new fuel lines, 
fairleads, and clamping configurations, in accordance with the 
Accomplishment Instructions of Cessna Service Bulletin SB750-49-12, 
Revision 1, dated August 3, 2006, terminates the repetitive 
inspection requirements of paragraphs (f) and (i) of this AD.

No Maintenance Transaction Report

    (l) Although Cessna Service Bulletin SB750-49-12, Revision 1, 
specifies to submit a maintenance transaction report to the 
manufacturer, this AD does not require that action.

Alternative Methods of Compliance (AMOCs)

    (m)(1) The Manager, Wichita Aircraft Certification Office (ACO), 
FAA, has the authority to approve AMOCs for this AD, if requested in 
accordance with the procedures found in 14 CFR 39.19.
    (2) Before using any AMOC approved in accordance with Sec.  
39.19 on any airplane to which the AMOC applies, notify the 
appropriate principal inspector in the FAA Flight Standards 
Certificate Holding District Office.

Material Incorporated by Reference

    (n) You must use Cessna Alert Service Letter ASL750-49-09, 
Revision 2, dated March 10, 2005; Cessna Service Bulletin SB750-49-
05, Revision 1, dated January 17, 2000; and Cessna Service Bulletin 
SB750-49-12, Revision 1, dated August 3, 2006; as applicable; to 
perform the actions that are required by this AD, unless the AD 
specifies otherwise.
    (1) The Director of the Federal Register approved the 
incorporation by reference of Cessna Service Bulletin SB750-49-12, 
dated August 3, 2006, in accordance with 5 U.S.C. 552(a) and 1 CFR 
part 51.
    (2) On May 10, 2005 (70 FR 21139, April 25, 2005), the Director 
of the Federal Register approved the incorporation by reference of 
Cessna Alert Service Letter ASL750-49-09, Revision 2, dated March 
10, 2005; and Cessna Service Bulletin SB750-49-05, Revision 1, dated 
January 17, 2000.
    (3) Contact Cessna Aircraft Co., P.O. Box 7706, Wichita, Kansas 
67277, for a copy of this service information. You may review copies 
at the Docket Management Facility, U.S. Department of 
Transportation, 400 Seventh Street, SW., Room PL-401, Nassif 
Building, Washington, DC; on the Internet at http://dms.dot.gov; or 
at the National Archives and Records Administration (NARA). For 
information on the availability of this material at the NARA, call 
(202) 741-6030, or go to http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.

    Issued in Renton, Washington, on November 3, 2006.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. E6-19439 Filed 11-20-06; 8:45 am]
BILLING CODE 4910-13-P

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