AD 2016-17-10

AD Final Rules - 2016-17-10.pdf
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AD Number:
2016-17-10
Document Type:
AD Final Rules
Docket Number:
FAA-2016-0463
Subject Heading:
Airworthiness Directives; The Boeing Company Airplanes
Subject:
Landing gear
Status:
Current
Citation:
(Federal Register Volume 81, Number 166 (Friday, August 26, 2016))
Citation Publish Date:
08/26/2016
Effective Date:
09/30/2016
Make:
The Boeing Company
Model:
777-200 Series | 777-200LR Series | 777-300 Series | 777-300ER Series | 777F Series
Product Type:
Aircraft
Product Subtype:
Large Airplane
Affected AD:
Superseded AD:
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
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[Federal Register Volume 81, Number 166 (Friday, August 26, 2016)]


[Rules and Regulations]


[Pages 58818-58821]


From the Federal Register Online via the Government Publishing Office [www.gpo.gov]


[FR Doc No: 2016-20375]


––––––––––––––––––––––––––––––––––


DEPARTMENT OF TRANSPORTATION


Federal Aviation Administration


14 CFR Part 39


[Docket No. FAA-2016-0463; Directorate Identifier 2015-NM-155-AD;Amendment 39-18623;


AD 2016-17-10]


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 all The Boeing Company


Model 777 airplanes. This AD was prompted by a report of an incident involving a landing in which


the pilots needed to input corrections due to airplane yaw and roll to the right; the main landing gear


(MLG) aft trunnion pin was later found to be fractured. This AD requires identification and


replacement of certain MLG aft trunnion pins. We are issuing this AD to prevent a fractured MLG aft


trunnion pin, which could result in collapse of the MLG and consequent loss of control of the


airplane during landing.


DATES:
 
This AD is effective September 30, 2016.


The Director of the Federal Register approved the incorporation by reference of a certain


publication listed in this AD as of September 30, 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 available on the Internet at


http://www.regulations.gov by searching for and locating Docket No. FAA-2016-0463.


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-2016-0463; 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,
2


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:
 
Eric Lin, Aerospace Engineer, Airframe Branch,


ANM-120S, FAA, Seattle Aircraft Certification Office (ACO), 1601 Lind Avenue SW., Renton, WA


98057-3356; phone: 425-917-6412; fax: 415-917-6590; email: eric.lin@faa.gov.


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 all The Boeing Company Model 777 airplanes. The NPRM published in the


Federal Register on February 18, 2016 (81 FR 8164) (''the NPRM''). The NPRM was prompted by a


report of an incident involving a landing in which the pilots needed to input corrections due to


airplane yaw and roll to the right; the MLG aft trunnion pin was later found to be fractured. The


NPRM proposed to require identification and replacement of certain MLG aft trunnion pins. We are


issuing this AD to prevent a fractured MLG aft trunnion pin, which could result in collapse of the


MLG and consequent loss of control of the airplane during landing.


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.


Support for the NPRM


Three commenters indicated their support for the NPRM.


Request To Update the Cost Section


One commenter, Gilles Oriot, asked that we update the cost estimate to reflect the costs shown in


Boeing Information Notice 777-32A0103 IN 03, dated February 2, 2015.


We agree with the commenter and have updated the Costs of Compliance to reflect the updated


information.


Request To Add to Credit Information


The Boeing Company, American Airlines, Air France, Korean Air, Etihad Airways, and All


Nippon Airways requested that we allow installation of pins with serial numbers beginning with


''EGL'' or ''MAL'' that have been inspected previously but were not marked ''BASE METAL


INSPECTED'' to fulfill the requirements of the proposed AD. The commenters stated that the


previous inspection may have been done as part of a previous overhaul or required inspection using


other service information that did not specify to mark ''BASE METAL INSPECTED.'' The


commenters also stated that the actions specified in the service information are consistent with the


requirements of the proposed AD. The commenters suggested various changes in order to allow


installation of these parts.


We acknowledge that previous inspections may have been done as part of an overhaul or


previous service requests, but we do not agree with the suggested changes. We disagree because


providing credit for the inspections required by this AD undermines the level of record review