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Rules and Regulations
Federal Register Vol. 86, No. 204
Tuesday, October 26, 2021

This section of the FEDERAL REGISTER
contains regulatory documents having general applicability and legal effect, most of which are keyed to and codified in the Code of Federal Regulations, which is published under 50 titles pursuant to 44 U.S.C. 1510.
The Code of Federal Regulations is sold by the Superintendent of Documents.

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 39
Docket No. FAA20210099; Project Identifier AD202001272T; Amendment 3921757; AD 20212019
RIN 2120AA64

Airworthiness Directives; The Boeing Company Airplanes Federal Aviation Administration FAA, DOT.
ACTION: Final rule.
AGENCY:

The FAA is adopting a new airworthiness directive AD for certain The Boeing Company Model 767200, 300, 300F, and 400ER series airplanes. This AD was prompted by significant changes made to the airworthiness limitations AWLs related to fuel tank ignition prevention and the nitrogen generation system.
This AD requires revising the existing maintenance or inspection program, as applicable, to incorporate the latest revision of the AWLs. The FAA is issuing this AD to address the unsafe condition on these products.
DATES: This AD is effective November 30, 2021.
The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD
as of November 30, 2021.
ADDRESSES: For service information identified in this final rule, contact Boeing Commercial Airplanes, Attention: Contractual & Data Services C&DS, 2600 Westminster Blvd., MC
110SK57, Seal Beach, CA 907405600;
telephone 5627971717; internet https www.myboeingfleet.com. You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 2062313195.
SUMMARY:

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It is also available at https
www.regulations.gov by searching for and locating Docket No. FAA2021
0099.
Examining the AD Docket You may examine the AD docket at https www.regulations.gov by searching for and locating Docket No.
FAA20210099; or in person at Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this final rule, any comments received, and other information. The address for Docket Operations is U.S. Department of Transportation, Docket Operations, M
30, West Building Ground Floor, Room W12140, 1200 New Jersey Avenue SE, Washington, DC 20590.
FOR FURTHER INFORMATION CONTACT:
Douglas Mansell, Aerospace Engineer, Propulsion Section, FAA, Seattle ACO
Branch, 2200 South 216th St., Des Moines, WA 98198; phone and fax: 206
2313875; email: douglas.e.mansell@
faa.gov.
SUPPLEMENTARY INFORMATION:
Background The FAA 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 767200, 300, 300F, and 400ER series airplanes. The NPRM
published in the Federal Register on February 26, 2021 86 FR 11653. The NPRM was prompted by significant changes made to the airworthiness limitations AWLs related to fuel tank ignition prevention and the nitrogen generation system. In the NPRM, the FAA proposed to require revising the existing maintenance or inspection program, as applicable, to incorporate the latest revision of the AWLs. The FAA is issuing this AD to address the potential for ignition sources inside fuel tanks caused by latent failures, alterations, repairs, or maintenance actions, which, in combination with flammable fuel vapors, could result in a fuel tank explosion and consequent loss of the airplane.
Discussion of Final Airworthiness Directive Comments The FAA received comments from The Air Line Pilots Association, International ALPA, and an
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individual, both of whom supported the NPRM without change.
The FAA received additional comments from five commenters, including Aviation Partners Boeing APB, Boeing, Japan Airlines JAL, United Airlines UAL, and United Parcel Service UPS. The following presents the comments received on the NPRM and the FAAs response to each comment.
Effect of Winglets on Accomplishment of the Proposed Actions APB stated that accomplishing Supplemental Type Certificate STC
ST01920SE does not affect the actions specified in the NPRM.
The FAA agrees with the commenter that STC ST01920SE does not affect the accomplishment of the manufacturers service instructions. Therefore, the installation of STC ST01920SE does not affect the ability to accomplish the actions required by this AD. The FAA
has not changed this AD in this regard.
Request To Remove Certain Unqualified Items Boeing requested that paragraphs h1 and 2 of the proposed AD be deleted to remove unqualified wire types and wire sleeving from the list of acceptable wire types and sleeving.
Boeing declared that it has qualified and certified wire types BMS 1348, BMS
1358, and BMS 1360, as well as Teflon wire sleeving TFE2X, but has not certified the additional types for Boeing airplanes.
The FAA does not agree to remove the paragraphs as requested. Since the issuance of AD 20081101 R1, Amendment 3916145 74 FR 68515, December 28, 2009 AD 20081101
R1, which will be terminated by this AD, the FAA received numerous requests for approval of alternative methods of compliance AMOCs from operators and STC holders or applicants to allow the installation of the alternative wire types and sleeving identified in paragraphs h1 and 2 of this AD. The FAA evaluated key attributes of those alternative wire types and sleeving for each installation, and issued numerous AMOC approvals based on the determination that installing those wire types and sleeving would provide an acceptable level of safety. Although paragraph h of this AD provides certain allowances, it does not provide approval of alternative wire
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