Published 2016-11-14 · Federal Register document 2016-25491
Airworthiness Directives; The Boeing Company Airplanes
Publication summary
We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 777-200, -200LR, -300, and -300ER series airplanes. This AD was prompted by a report indicating that the manufacturer discovered locations where the control components and wiring of the left and right engine fuel spar valves do not have adequate physical separation to meet the redundant system separation requirements. This AD requires modifying the wiring, and installing a new relay bracket and new location for the relay on the left and right engine fuel spar valves. This AD also requires an inspection to identify the part number of the motor operated valve (MOV) actuators for the left and right engine fuel spar valves; replacement of specified MOV actuators with new MOV actuators; certain bonding resistance measurements; and applicable corrective actions. We are issuing this AD to prevent loss of control of both the left and right engine fuel spar valves during a single event, such as local wire bundle damage or a wire bundle fire, which could cause both engines to shut down or result in the inability to control an engine fire.
Why this record is shown
Source: Federal Register annual FAA metadata. Acquired 2026-09-03T22:23:51.853224+00:00. The title, summary and date are source facts.
- Source revision
- federal_register_ad_metadata_2016-48fe8cb6c57c00b7
- Source row
- results[360]
- Raw source SHA-256
- 48fe8cb6c57c00b74623eb2b71ad0abe73b95a424a8ac83fecd389da4d1e3a81
Final-rule publication
Recorded publication clauses
- AD identifier printed in this edition
- 2016-21-05
- Effective date printed in this edition
- 2016-12-19
Read 13 complete recorded clauses
Effective Date
(a) Effective Date
This AD is effective December 19, 2016.
Exact source excerpt. Text positions 20255–20320, end exclusive, in the original decoded publication. SHA-256: 7a575ca2a8538e0520eaad18083c0e0a222d159b8e02c3143be02852bb7192a7
Affected ADs
(b) Affected ADs
None.
Exact source excerpt. Text positions 20320–20349, end exclusive, in the original decoded publication. SHA-256: 871a4afc60ceeae06e8010585055188633d616078500c45937092bfe892239c0
Applicability wording · Applicability
(c) Applicability
This AD applies to The Boeing Company Model 777-200, -200LR, -
300, and -300ER series airplanes, certificated in any category, as
identified in Boeing Special Attention Service Bulletin 777-28-0061,
Revision 2, dated May 4, 2015.
Exact source excerpt. Text positions 20349–20605, end exclusive, in the original decoded publication. SHA-256: 2afe3c81d65b7f56f98b9d34d5df9713eff535cc3f797fe9cdaf69a4a303a778
Subject
(d) Subject
Air Transport Association (ATA) of America Code 2822, Fuel Boost
Pump.
Exact source excerpt. Text positions 20605–20695, end exclusive, in the original decoded publication. SHA-256: a8e2a865fa83c75d7cbca880693d8313888e7631ab2b7073843e548e487403b6
Unsafe Condition
(e) Unsafe Condition
This AD was prompted by a report indicating that the
manufacturer discovered locations where the control components and
wiring of the left and right engine fuel spar valves do not have
adequate physical separation to meet the redundant system separation
requirements. We are issuing this AD to prevent loss of control of
both the left and right engine fuel spar valves during a single
event, such as local wire bundle damage or a wire bundle fire, which
could cause both engines to shut down or result in the inability to
control an engine fire.
Exact source excerpt. Text positions 20695–21276, end exclusive, in the original decoded publication. SHA-256: 7eb433e9bac5fa4bb618e3629476498adadfba1790a19dbc105bc26315f744bd
Compliance
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
Exact source excerpt. Text positions 21276–21378, end exclusive, in the original decoded publication. SHA-256: 00fbfa31932483f627d0ce0a11cbd2e35e15d9231842b91ac85623ce533912d3
Modification
(g) Modification
Within 60 months after the effective date of this AD, modify the
wiring and install new relay brackets in new locations to allow
installation of new relays for the left and right engine fuel spar
valves, in accordance with the Accomplishment Instructions of Boeing
Special Attention Service Bulletin 777-28-0061, Revision 2, dated
May 4, 2015, except as required by paragraph (h) of this AD.
Exact source excerpt. Text positions 21378–21798, end exclusive, in the original decoded publication. SHA-256: 3c67ec9dfa07642a5598c0a7cf761360240e1f14b36edd354a825925abfba1a5
Exceptions to the Service Information
(h) Exceptions to the Service Information
(1) Where Boeing Special Attention Service Bulletin 777-28-0061,
Revision 2, dated May 4, 2015, specifies to use Figure 22, Sheet 9,
for the wiring installation of the right engine fuel spar valve,
this AD requires using figure 1 to paragraph (h) of this AD.
(2) Boeing Special Attention Service Bulletin 777-28-0061,
Revision 2, dated May 4, 2015, specifies to use Figure 11, Sheet 1,
for the wiring change at E2-6--Shelf to Disconnect Panel and Splice
Area. The figure shows the capping and stowing of an existing wire,
W4255-1002-20, which is terminated at splice SP41201. The wire
number is incorrect. The correct wire number to cap and stow is
W6251-1002-20, which is terminated at splice SP41201.
BILLING CODE 4910-13-P
[[Page 79388]]
[GRAPHIC] [TIFF OMITTED] TR14NO16.003
BILLING CODE 4910-13-C
Exact source excerpt. Text positions 21798–22665, end exclusive, in the original decoded publication. SHA-256: 17b701d34ffe0324a336b7fca2917dd6b662e63eb584ca5813cbcd6c2d35033c
Concurrent Requirements
(i) Concurrent Requirements
(1) Prior to or concurrently with accomplishing the requirements
of paragraph (g) of this AD: Do an inspection of the motor operated
valve (MOV) actuators of the left and right engine fuel spar valves
for part number (P/N) MA20A1001-1, in accordance with the
Accomplishment Instructions of Boeing Service Bulletin 777-28A0034,
Revision 3, dated September 25, 2015. A review of airplane
maintenance records is acceptable in lieu of this inspection if the
part number can be conclusively determined from that review.
(2) If any MOV actuator having P/N MA20A1001-1 is found during
the inspection required by paragraph (i)(1) of this AD, prior to or
concurrently with accomplishing the requirements of paragraph (g) of
this AD, replace the MOV actuator with either a new or serviceable
MOV actuator having P/N MA30A1001, MA30A1017, MA20A2027, or an MOV
actuator that meets the criteria specified in paragraphs (i)(2)(i)
and (i)(2)(ii) of this AD; and, as applicable, measure the
electrical resistance of the bond from the adapter plate to the
airplane structure and, before further flight, do all applicable
corrective actions. All actions specified in this paragraph for the
left and right engine fuel spar valves must be done in accordance
with the Accomplishment Instructions of Boeing Service Bulletin 777-
28A0034, Revision 3, dated September 25, 2015.
(i) The replacement MOV actuator must be a Boeing part that is
approved after the issuance of Boeing Service Bulletin 777-28A0034,
Revision 3, dated September 25, 2015, by the Manager, Seattle
Aircraft
[[Page 79389]]
Certification Office (ACO), FAA; or the Boeing Commercial Airplanes
Organization Designation Authorization (ODA) that has been
authorized by the Manager, Seattle ACO, to approve the part.
(ii) The replacement MOV actuator must be fully interchangeable
with the part specified in Boeing Service Bulletin 777-28A0034,
Revision 3, dated September 25, 2015.
Exact source excerpt. Text positions 22665–24663, end exclusive, in the original decoded publication. SHA-256: c75f84a1fd288b7ceba4732ce00aebab7c18fe0c0ca84d220a7b2ff1b4c444e6
Credit for Previous Actions
(j) Credit for Previous Actions
(1) This paragraph provides credit for the requirements of
paragraph (g) of this AD, if those actions were performed before the
effective date of this AD using Boeing Special Attention Service
Bulletin 777-28-0061, dated October 25, 2010; or Boeing Special
Attention Service Bulletin 777-28-0061, Revision 1, dated January
26, 2012; as applicable. These documents are not incorporated by
reference in this AD.
(2) This paragraph provides credit for the requirements of
paragraph (i) of this AD, if those actions were performed before
April 25, 2013 (the effective date of AD 2013-05-03, Amendment 39-
17375 (78 FR 17290, March 21, 2013), ``AD 2013-05-03''), using
Boeing Alert Service Bulletin 777-28A0034, dated August 2, 2007; or
Boeing Alert Service Bulletin 777-28A0034, Revision 1, dated May 20,
2010; except that the replacement of MOV actuators of the left and
right engine fuel spar valves must also include cap sealing the
bonding jumper, as described in Boeing Service Bulletin 777-28A0034,
Revision 2, dated September 20, 2010; and provided that the
replacement is an MOV actuator identified in paragraph (j)(2)(i) or
(j)(2)(ii) of this AD. Boeing Alert Service Bulletin 777-28A0034,
dated August 2, 2007, and Boeing Alert Service Bulletin 777-28A0034,
Revision 1, dated May 20, 2010, are not incorporated by reference in
this AD. Boeing Service Bulletin 777-28A0034, Revision 2, dated
September 20, 2010, is incorporated by reference in AD 2013-05-03.
(i) An MOV actuator that has P/N MA30A1001, MA30A1017, or
MA20A2027.
(ii) An MOV actuator that has a part number other than P/N
MA20A1001-1 and meets the criteria specified in paragraphs (i)(2)(i)
and (i)(2)(ii) of this AD.
(3) This paragraph provides credit for the requirements of
paragraph (i) of this AD, if those actions were performed before the
effective date of this AD using Boeing Service Bulletin 777-28A0034,
Revision 2, dated September 20, 2010, which was incorporated by
reference in AD 2013-05-03.
Exact source excerpt. Text positions 24663–26721, end exclusive, in the original decoded publication. SHA-256: 1970e88f4a480cbd093f4f70311d4daf8b2cf690543e79e3d55fc9ccc83df34c
Alternative Methods of Compliance (AMOCs)
(k) Alternative Methods of Compliance (AMOCs)
(1) The Manager, Seattle 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
(l)(1) 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.
(3) An AMOC that provides an acceptable level of safety may be
used for any repair, modification, or alteration required by this AD
if it is approved by the Boeing Commercial Airplanes ODA that has
been authorized by the Manager, Seattle ACO, to make those findings.
To be approved, the repair method, modification deviation, or
alteration deviation must meet the certification basis of the
airplane and the approval must specifically refer to this AD.
Exact source excerpt. Text positions 26721–27928, end exclusive, in the original decoded publication. SHA-256: da07cc856a116a67263d93ea0b7c871deaf4dcfe9ed8b2a6807f6d641c220b50
Related Information
(l) Related Information
(1) For more information about this AD, contact Brendan Shanley,
Aerospace Engineer, Systems and Equipment Branch, ANM-130S, FAA,
Seattle Aircraft Certification Office, 1601 Lind Avenue SW., Renton,
WA 98057-3356; telephone: 425-917-6492; fax: 425-917-6590; email:
[email protected].
(2) Service information identified in this AD that is not
incorporated by reference is available at the addresses specified in
paragraphs (m)(3) and (m)(4) of this AD.
Exact source excerpt. Text positions 27928–28420, end exclusive, in the original decoded publication. SHA-256: 4e1ff00dda0a5068ede96907346776d43ce3826cb6e9ade89d76bab8f272b8a3
Material Incorporated by Reference
(m) Material Incorporated by Reference
(1) The Director of the Federal Register approved the
incorporation by reference (IBR) of the service information listed
in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
(2) You must use this service information as applicable to do
the actions required by this AD, unless the AD specifies otherwise.
(i) Boeing Special Attention Service Bulletin 777-28-0061,
Revision 2, dated May 4, 2015.
(ii) Boeing Service Bulletin 777-28A0034, Revision 3, dated
September 25, 2015.
(3) For Boeing service information identified in this AD,
contact Boeing Commercial Airplanes, Attention: Data & Services
Management, P.O. Box 3707, MC 2H-65, Seattle, WA 98124-2207;
telephone 206-544-5000, extension 1; fax 206-766-5680; Internet
https://www.myboeingfleet.com.
(4) You may view this service information at FAA, Transport
Airplane Directorate, 1601 Lind Avenue SW., Renton, WA. For
information on the availability of this material at the FAA, call
425-227-1221.
(5) You may view this service information that is incorporated
by reference at the National Archives and Records Administration
(NARA). For information on the availability of this material at
NARA, call 202-741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibr-locations.html.
Exact source excerpt. Text positions 28420–29754, end exclusive, in the original decoded publication. SHA-256: 3c1da0cf67d9b93aba1addb8332bb00da78da89ca96fe13c68235e868cfcacba
No replacement link has been established from this edition. The complete historical rule chain and current legal effect remain unknown.
Find all recorded historical references to AD 2016-21-05 · 0 printed reference observations in this pinned collection.
These are observations from one dated publication. Current legal status is unknown; aircraft applicability, installed configuration, compliance and burden require separate evidence. Missing or unparsed conditions remain unknown.
Why these observations are shown
They were extracted offline from the same immutable official HTML source as the complete recorded text. The dated source wording, original text coordinates and exact quote digests are retained. PDF/text agreement and current regulatory effect have not been qualified.
Observation revision: whole-ad-publication-clause-observations-1.0.1. Text SHA-256: af8ece75113e720b231596603c4e343d44e613b9befdd5384d85634871d7a291. Source manifest: 136ebfa99ea39d3fecaedb2e817b78b5aa03fe0a8160865e2b7810c1e41ebe72.
Official source · 2016-11-14
Publication text
This is the complete recorded text of this dated publication.
Current legal effect is unknown. Aircraft applicability, installed configuration and compliance require separate evidence. PDF/text agreement has not been evaluated.
Read the complete official publication text
[Federal Register Volume 81, Number 219 (Monday, November 14, 2016)]
[Rules and Regulations]
[Pages 79384-79389]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2016-25491]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2015-7527; Directorate Identifier 2015-NM-094-AD;
Amendment 39-18686; AD 2016-21-05]
RIN 2120-AA64
Airworthiness Directives; The Boeing Company Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
-----------------------------------------------------------------------
SUMMARY: We are adopting a new airworthiness directive (AD) for certain
The Boeing Company Model 777-200, -200LR, -300, and -300ER series
airplanes. This AD was prompted by a report indicating that the
manufacturer discovered locations where the control components and
wiring of the left and right engine fuel spar valves do not have
adequate physical separation to meet the redundant system separation
requirements. This AD requires modifying the wiring, and installing a
new relay bracket and new location for the relay on the left and right
engine fuel spar valves. This AD also requires an inspection to
identify the part number of the motor operated valve (MOV) actuators
for the left and right engine fuel spar valves; replacement of
specified MOV actuators with new MOV actuators; certain bonding
resistance measurements; and applicable corrective actions. We are
issuing this AD to prevent loss of control of both the left and right
engine fuel spar valves during a single event, such as local wire
bundle damage or a wire bundle fire, which could cause both engines to
shut down or result in the inability to control an engine fire.
DATES: This AD is effective December 19, 2016.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of December 19,
2016.
ADDRESSES: For service information identified in this final rule,
contact Boeing Commercial Airplanes, Attention: Data & Services
Management, P.O. Box 3707, MC 2H-65, Seattle, WA 98124-2207; telephone
206-544-5000, extension 1; fax 206-766-5680; Internet https://www.myboeingfleet.com. You may view this referenced service information
at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW.,
Renton, WA. For information on the availability of this material at the
FAA, call 425-227-1221. It is also
[[Page 79385]]
available on the Internet at http://www.regulations.gov by searching
for and locating Docket No. FAA-2015-7527.
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-
7527; 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 address for the Docket Office (phone: 800-647-
5527) is Docket Management Facility, U.S. Department of Transportation,
Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200
New Jersey Avenue SE., Washington, DC 20590.
FOR FURTHER INFORMATION CONTACT: Brendan Shanley, Aerospace Engineer,
Systems and Equipment Branch, ANM-130S, FAA, Seattle Aircraft
Certification Office, 1601 Lind Avenue SW., Renton, WA 98057-3356;
telephone: 425-917-6492; fax: 425-917-6590; email:
[email protected].
SUPPLEMENTARY INFORMATION:
Discussion
We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR
part 39 by adding an AD that would apply to certain The Boeing Company
Model 777-200, -200LR, -300, and -300ER series airplanes. The NPRM
published in the Federal Register on December 23, 2015 (80 FR 79754)
(``the NPRM''). The NPRM was prompted by a report indicating that the
manufacturer discovered locations where the control components and
wiring of the left and right engine fuel spar valves do not have
adequate physical separation to meet the redundant system separation
requirements. The NPRM proposed to require modifying the wiring, and
installing a new relay bracket and new location for the relay on the
left and right engine fuel spar valves. The NPRM also proposed to
require an inspection to identify the part number of the MOV actuators
for the left and right engine fuel spar valves; replacement of
specified MOV actuators with new MOV actuators; certain bonding
resistance measurements; and applicable corrective actions. We are
issuing this AD to prevent loss of control of both the left and right
engine fuel spar valves during a single event, such as local wire
bundle damage or a wire bundle fire, which could cause both engines to
shut down or result in the inability to control an engine fire.
Comments
We gave the public the opportunity to participate in developing
this AD. The following presents the comments received on the NPRM and
the FAA's response to each comment. Boeing stated that it has reviewed
the NPRM and concurs with the contents of the NPRM.
Request To Reduce the Compliance Time
One commenter, Geoffrey Barrance, requested that we reduce the
compliance time in paragraph (g) of the proposed AD. Mr. Barrance
stated he is concerned that the timescale proposed for implementing the
required modification, 60 months after the effective date of the AD, is
too long. Mr. Barrance commented that the unsafe condition is a common
failure affecting the continued operation of both engines, and
therefore is critical to the safe flight and landing of any airplane.
We disagree with the commenter's request. It is important to note
that while the commenter has indicated there is currently a common mode
failure affecting the continued operation of both engines, it is more
accurate to say that certain airplanes are currently in a configuration
that makes them vulnerable to a single event causing a common mode
failure. However, there have been no reports of any events causing this
condition. This AD is intended to eliminate that condition.
The compliance time is determined to be appropriate in
consideration of the risk and the safety implications, the average
utilization rate of the affected fleet, the practical aspects of an
orderly modification of the fleet during regular maintenance periods,
and the availability of required modification parts. In addition to our
own criteria, we have also considered the manufacturer's safety
assessment and recommendation for the compliance time. The compliance
time accounts for the risk to the fleet, availability of parts, and
other factors. Therefore, we have determined that the compliance time
is acceptable. We have not changed this AD in this regard.
Request To Remove the Concurrent Requirements
All Nippon Airways (ANA), Japan Airlines (JAL), and United Airlines
(UAL) requested that we remove the concurrent requirement for
accomplishing Boeing Service Bulletin 777-28A0034, Revision 3, dated
September 25, 2015. JAL and ANA stated that there was no relationship
between the wiring change and the actuator replacement. ANA, JAL, and
UAL commented that Boeing Service Bulletin 777-28A0034, Revision 3,
dated September 25, 2015, is already mandated by AD 2013-05-03,
Amendment 39-17375 (78 FR 17290, March 21, 2013) (``AD 2013-05-03''),
and it addressed MOV actuator part number (P/N) MA20A1001-1; therefore,
it should not be a concurrent requirement. ANA also added that because
the MOV actuator has been addressed, paragraphs (i)(2) and (i)(3) of
the proposed AD should not be included.
We partially agree with the commenters. We agree that the actions
in Boeing Service Bulletin 777-28A0034, Revision 3, dated September 25,
2015, are the same actions that are required by AD 2013-05-03 in
accordance with Boeing Service Bulletin 777-28A0034, Revision 2, dated
September 20, 2010, with a compliance date of April 25, 2018. Because
of the overlap in compliance times, the action required by AD 2013-05-
03 may not be fully completed by the time the requirements of this AD
become effective. To ensure that the actuator change, in accordance
with Boeing Service Bulletin 777-28A0034, Revision 3, dated September
25, 2015, is done prior to the wiring change in accordance with Boeing
Special Attention Service Bulletin 777-28-0061, Revision 2, dated May
4, 2015, we have required Boeing Service Bulletin 777-28A0034, Revision
3, dated September 25, 2015, as a concurrent requirement in this AD.
Without this concurrent requirement, it is possible that this AD could
approve certain configurations that are not compliant and safe. The
concurrent requirement eliminates this possibility. The requirements of
Boeing Service Bulletin 777-28A0034, Revision 3, dated September 25,
2015, and related credit for previous actions, will remain as stated.
We have not changed this AD in this regard.
Request To Use Boeing Information Notice for Completing the
Requirements in the AD
ANA requested that we include Boeing Service Bulletin Information
Notice 777-28-0061, IN 03, dated November 16, 2015, to this AD to allow
the operators to complete the proposed requirements of the NPRM.
We partially agree with the commenter's request. We cannot include
Boeing Service Bulletin Information Notice 777-28-0061, IN 03, dated
November 16, 2015, as an
[[Page 79386]]
appropriate source of service information in this AD because it is not
an FAA-approved document. However, we acknowledge that for certain
airplanes, Figure 22, Sheet 9, of Boeing Special Attention Service
Bulletin 777-28-0061, Revision 2, dated May 4, 2015, includes an
editorial error, which shows incorrect wire routing. Boeing Service
Bulletin Information Notice 777-28-0061, IN 03, dated November 16,
2015, allows for a modification of Group 2 airplanes that meets the
requirements of the AD without an additional burden to operators. We
have included a corrected figure in paragraph (h) of this AD to address
this issue.
In addition, Figure 11, Sheet 1, of Boeing Special Attention
Service Bulletin 777-28-0061, Revision 2, dated May 4, 2015, is
incorrect in that it shows the cap and stow of an existing wire, W4255-
1002-20, which is terminated at splice SP41201. The correct wire number
to be capped and stowed is W6251-1002-20, which is terminated at splice
SP41201. We have clarified this information in paragraph (h)(2) of this
AD.
Request To Clarify the Terminating Action
JAL and UAL requested that we clarify the terminating action
specified in the proposed rule. JAL asked that Boeing Service Bulletin
777-28A0034 be used as a terminating action for the requirements of the
proposed rule. UAL stated that since AD 2013-05-03 already addressed
MOV actuator P/N MA20A2027 and P/N MA30A1001, it contradicts
airworthiness limitations (AWL) 28-AWL-MOV, which was mandated in AD
2015-19-01, Amendment 39-18264 (80 FR 55521, dated September 16, 2015)
(``AD 2015-19-01'').
We agree that clarification is necessary. We agree that certain
configurations in Boeing Service Bulletin 777-28A0034, Revision 3,
dated September 25, 2015, in conjunction with previous airplane
configurations, alleviate the need to do the AWL task implemented by AD
2013-05-03 because the configurations are outside the applicability of
that AWL. However, we disagree with using Boeing Service Bulletin 777-
28A0034, Revision 3, dated September 25, 2015, as a terminating action
because the requirement of AD 2015-19-01 is to implement the
airworthiness limitations items (ALI) into an operator's maintenance
program, and this must be done regardless of the configuration of the
airplane. Further, certain MOV actuator part numbers can be installed
that will place an airplane in the applicability of AWL 28-AWL-MOV,
thus requiring periodic inspections to ensure safe operation. Each
operator has the option to select a configuration best for its
circumstances and can evaluate its configurations and determine if AWL
28-AWL-MOV is applicable to their fleet configuration. We have not
changed this AD in this regard.
Request To Review the Design and Certification Process
Geoffrey Barrance requested that we review the design and
certification process that allowed for the unsafe condition to exist,
as well as a review of designs in other airplanes with similar unsafe
conditions. Mr. Barrance commented that the unsafe condition indicated
a failure has occurred in the design and certification process for the
airplane type. Mr. Barrance also commented that a review of the
airplane design is required to prevent the implementation of common
mode fault exposures for redundant systems.
We acknowledge the commenter's concerns. We continuously evaluate
our certification system and procedures and improve them when problems
are found. If the FAA is made aware of potential design deficiencies
occurring on a certificated product, we conduct an investigation,
evaluate the manufacturer's root-cause analysis, and make a
determination whether or not an unsafe condition exists. We then take
appropriate action to mitigate the unsafe condition and to identify and
incorporate certification system process improvements for future
designs. Furthermore, the manufacturer performs a cross model
evaluation to determine if the condition exists on other models. We
agree with the manufacturer's actions in this regard. We have not
changed this AD regarding this issue.
Conclusion
We reviewed the relevant data, considered the comments received,
and determined that air safety and the public interest require adopting
this AD with the changes described previously and minor editorial
changes. We have determined that these minor changes:
<bullet> Are consistent with the intent that was proposed in the
NPRM for correcting the unsafe condition; and
<bullet> Do not add any additional burden upon the public than was
already proposed in the NPRM.
We also determined that these changes will not increase the
economic burden on any operator or increase the scope of this AD.
Related Service Information Under 1 CFR Part 51
We reviewed Boeing Special Attention Service Bulletin 777-28-0061,
Revision 2, dated May 4, 2015. The service information describes
procedures for modifying the wiring, and installing a new relay bracket
and new location for the relay on the left and right engine fuel spar
valves.
We have also reviewed Boeing Service Bulletin 777-28A0034, Revision
3, dated September 25, 2015. The service information describes
procedures for an inspection of the MOV actuators of the left and right
engine fuel spar valves for (P/N) MA20A1001-1, replacement of MOV
actuators, measurement of the electrical resistance of the bond from
the adapter plate to the airplane structure, and applicable corrective
actions.
This service information is reasonably available because the
interested parties have access to it through their normal course of
business or by the means identified in the ADDRESSES section.
Costs of Compliance
We estimate that this AD affects 133 airplanes of U.S. registry.
We estimate the following costs to comply with this AD:
Estimated Costs
----------------------------------------------------------------------------------------------------------------
Cost on U.S.
Action Labor cost Parts cost Cost per product operators
----------------------------------------------------------------------------------------------------------------
Installation and modification... 119 work-hours x Up to $3,780 Up to $13,895 Up to $1,848,035
$85 per hour = depending on depending on depending on
$10,115. airplane airplane airplane
configuration. configuration. configuration.
Inspection of MOV actuators 1 work-hour x $85 $0................ $85............... $11,305.
[concurrent requirements]. per hour = $85.
----------------------------------------------------------------------------------------------------------------
[[Page 79387]]
We estimate the following costs to do any necessary replacements
and bonding resistance measurements that would be required based on the
results of the inspection. We have no way of determining the number of
aircraft that might need these replacements:
On-Condition Costs
----------------------------------------------------------------------------------------------------------------
Action Labor cost Parts cost Cost per product
----------------------------------------------------------------------------------------------------------------
Replacement of MOV actuators for the Up to 105 work-hours x Up to $10,954.......... Up to $19,879.
left and right engine fuel spar $85 per hour = $8,925.
valves.
Bonding resistance measurements...... 1 work-hour x $85 per $0..................... $85.
hour = $85.
----------------------------------------------------------------------------------------------------------------
We have received no definitive data on the costs of the corrective
actions for the bonding resistance measurement in this AD.
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 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 adding the following new airworthiness
directive (AD):
2016-21-05 The Boeing Company: Amendment 39-18686; Docket No. FAA-
2015-7527; Directorate Identifier 2015-NM-094-AD.
(a) Effective Date
This AD is effective December 19, 2016.
(b) Affected ADs
None.
(c) Applicability
This AD applies to The Boeing Company Model 777-200, -200LR, -
300, and -300ER series airplanes, certificated in any category, as
identified in Boeing Special Attention Service Bulletin 777-28-0061,
Revision 2, dated May 4, 2015.
(d) Subject
Air Transport Association (ATA) of America Code 2822, Fuel Boost
Pump.
(e) Unsafe Condition
This AD was prompted by a report indicating that the
manufacturer discovered locations where the control components and
wiring of the left and right engine fuel spar valves do not have
adequate physical separation to meet the redundant system separation
requirements. We are issuing this AD to prevent loss of control of
both the left and right engine fuel spar valves during a single
event, such as local wire bundle damage or a wire bundle fire, which
could cause both engines to shut down or result in the inability to
control an engine fire.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Modification
Within 60 months after the effective date of this AD, modify the
wiring and install new relay brackets in new locations to allow
installation of new relays for the left and right engine fuel spar
valves, in accordance with the Accomplishment Instructions of Boeing
Special Attention Service Bulletin 777-28-0061, Revision 2, dated
May 4, 2015, except as required by paragraph (h) of this AD.
(h) Exceptions to the Service Information
(1) Where Boeing Special Attention Service Bulletin 777-28-0061,
Revision 2, dated May 4, 2015, specifies to use Figure 22, Sheet 9,
for the wiring installation of the right engine fuel spar valve,
this AD requires using figure 1 to paragraph (h) of this AD.
(2) Boeing Special Attention Service Bulletin 777-28-0061,
Revision 2, dated May 4, 2015, specifies to use Figure 11, Sheet 1,
for the wiring change at E2-6--Shelf to Disconnect Panel and Splice
Area. The figure shows the capping and stowing of an existing wire,
W4255-1002-20, which is terminated at splice SP41201. The wire
number is incorrect. The correct wire number to cap and stow is
W6251-1002-20, which is terminated at splice SP41201.
BILLING CODE 4910-13-P
[[Page 79388]]
[GRAPHIC] [TIFF OMITTED] TR14NO16.003
BILLING CODE 4910-13-C
(i) Concurrent Requirements
(1) Prior to or concurrently with accomplishing the requirements
of paragraph (g) of this AD: Do an inspection of the motor operated
valve (MOV) actuators of the left and right engine fuel spar valves
for part number (P/N) MA20A1001-1, in accordance with the
Accomplishment Instructions of Boeing Service Bulletin 777-28A0034,
Revision 3, dated September 25, 2015. A review of airplane
maintenance records is acceptable in lieu of this inspection if the
part number can be conclusively determined from that review.
(2) If any MOV actuator having P/N MA20A1001-1 is found during
the inspection required by paragraph (i)(1) of this AD, prior to or
concurrently with accomplishing the requirements of paragraph (g) of
this AD, replace the MOV actuator with either a new or serviceable
MOV actuator having P/N MA30A1001, MA30A1017, MA20A2027, or an MOV
actuator that meets the criteria specified in paragraphs (i)(2)(i)
and (i)(2)(ii) of this AD; and, as applicable, measure the
electrical resistance of the bond from the adapter plate to the
airplane structure and, before further flight, do all applicable
corrective actions. All actions specified in this paragraph for the
left and right engine fuel spar valves must be done in accordance
with the Accomplishment Instructions of Boeing Service Bulletin 777-
28A0034, Revision 3, dated September 25, 2015.
(i) The replacement MOV actuator must be a Boeing part that is
approved after the issuance of Boeing Service Bulletin 777-28A0034,
Revision 3, dated September 25, 2015, by the Manager, Seattle
Aircraft
[[Page 79389]]
Certification Office (ACO), FAA; or the Boeing Commercial Airplanes
Organization Designation Authorization (ODA) that has been
authorized by the Manager, Seattle ACO, to approve the part.
(ii) The replacement MOV actuator must be fully interchangeable
with the part specified in Boeing Service Bulletin 777-28A0034,
Revision 3, dated September 25, 2015.
(j) Credit for Previous Actions
(1) This paragraph provides credit for the requirements of
paragraph (g) of this AD, if those actions were performed before the
effective date of this AD using Boeing Special Attention Service
Bulletin 777-28-0061, dated October 25, 2010; or Boeing Special
Attention Service Bulletin 777-28-0061, Revision 1, dated January
26, 2012; as applicable. These documents are not incorporated by
reference in this AD.
(2) This paragraph provides credit for the requirements of
paragraph (i) of this AD, if those actions were performed before
April 25, 2013 (the effective date of AD 2013-05-03, Amendment 39-
17375 (78 FR 17290, March 21, 2013), ``AD 2013-05-03''), using
Boeing Alert Service Bulletin 777-28A0034, dated August 2, 2007; or
Boeing Alert Service Bulletin 777-28A0034, Revision 1, dated May 20,
2010; except that the replacement of MOV actuators of the left and
right engine fuel spar valves must also include cap sealing the
bonding jumper, as described in Boeing Service Bulletin 777-28A0034,
Revision 2, dated September 20, 2010; and provided that the
replacement is an MOV actuator identified in paragraph (j)(2)(i) or
(j)(2)(ii) of this AD. Boeing Alert Service Bulletin 777-28A0034,
dated August 2, 2007, and Boeing Alert Service Bulletin 777-28A0034,
Revision 1, dated May 20, 2010, are not incorporated by reference in
this AD. Boeing Service Bulletin 777-28A0034, Revision 2, dated
September 20, 2010, is incorporated by reference in AD 2013-05-03.
(i) An MOV actuator that has P/N MA30A1001, MA30A1017, or
MA20A2027.
(ii) An MOV actuator that has a part number other than P/N
MA20A1001-1 and meets the criteria specified in paragraphs (i)(2)(i)
and (i)(2)(ii) of this AD.
(3) This paragraph provides credit for the requirements of
paragraph (i) of this AD, if those actions were performed before the
effective date of this AD using Boeing Service Bulletin 777-28A0034,
Revision 2, dated September 20, 2010, which was incorporated by
reference in AD 2013-05-03.
(k) Alternative Methods of Compliance (AMOCs)
(1) The Manager, Seattle 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
(l)(1) 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.
(3) An AMOC that provides an acceptable level of safety may be
used for any repair, modification, or alteration required by this AD
if it is approved by the Boeing Commercial Airplanes ODA that has
been authorized by the Manager, Seattle ACO, to make those findings.
To be approved, the repair method, modification deviation, or
alteration deviation must meet the certification basis of the
airplane and the approval must specifically refer to this AD.
(l) Related Information
(1) For more information about this AD, contact Brendan Shanley,
Aerospace Engineer, Systems and Equipment Branch, ANM-130S, FAA,
Seattle Aircraft Certification Office, 1601 Lind Avenue SW., Renton,
WA 98057-3356; telephone: 425-917-6492; fax: 425-917-6590; email:
[email protected].
(2) Service information identified in this AD that is not
incorporated by reference is available at the addresses specified in
paragraphs (m)(3) and (m)(4) of this AD.
(m) Material Incorporated by Reference
(1) The Director of the Federal Register approved the
incorporation by reference (IBR) of the service information listed
in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
(2) You must use this service information as applicable to do
the actions required by this AD, unless the AD specifies otherwise.
(i) Boeing Special Attention Service Bulletin 777-28-0061,
Revision 2, dated May 4, 2015.
(ii) Boeing Service Bulletin 777-28A0034, Revision 3, dated
September 25, 2015.
(3) For Boeing service information identified in this AD,
contact Boeing Commercial Airplanes, Attention: Data & Services
Management, P.O. Box 3707, MC 2H-65, Seattle, WA 98124-2207;
telephone 206-544-5000, extension 1; fax 206-766-5680; Internet
https://www.myboeingfleet.com.
(4) You may view this service information at FAA, Transport
Airplane Directorate, 1601 Lind Avenue SW., Renton, WA. For
information on the availability of this material at the FAA, call
425-227-1221.
(5) You may view this service information that is incorporated
by reference at the National Archives and Records Administration
(NARA). For information on the availability of this material at
NARA, call 202-741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibr-locations.html.
Issued in Renton, Washington, on October 7, 2016.
Michael Kaszycki,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 2016-25491 Filed 11-10-16; 8:45 am]
BILLING CODE 4910-13-P
Why this text is shown
The complete text was extracted from the official GovInfo HTML edition for this publication. Acquired 2026-10-09T02:24:37.984727+00:00. Text extraction preserves the recorded source wording; it does not determine current requirements.
Open the captured official edition
- Source SHA-256
- 799008798ef752e895544486ab45881d65ba13bbf17e7b6305a6fcf85269d9b0
- Text SHA-256
- af8ece75113e720b231596603c4e343d44e613b9befdd5384d85634871d7a291
Return to the full metadata catalog · Search complete publication text · Explore retained publication text and evidence
Coverage and limits
These are dated publication metadata, recorded clauses and literal source observations. Word, model-label, header and reference matches do not establish current legal effect, manufacturer/model identity, aircraft applicability, installed configuration or compliance.
The collection uses 33 explicit annual source snapshots. Source captures and operative-text qualifications have separate states. Missing information remains unknown.