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Department of Transportation
Federal Aviation Administration
• 14 CFR Part 39
• [Docket No. FAA-2025-0348; Project Identifier AD-2024-00626-T; Amendment 39-23288; AD 2026-05-15]
• RIN 2120-AA64
( printed page 12497)
AGENCY:
Federal Aviation Administration (FAA), DOT.
ACTION:
Final rule.
SUMMARY:
The FAA is adopting a new airworthiness directive (AD) for certain The Boeing Company Model 777-200LR and -300ER series airplanes. This AD was prompted by reports of chafing and arcing damage on the light emitting diode (LED) sidewall wire bundles. This AD requires a general visual inspection (GVI) of the sidewall light for chafing damage and applicable on-condition actions. The FAA is issuing this AD to address the unsafe condition on these products.
DATES:
This AD is effective April 20, 2026.
The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of April 20, 2026.
ADDRESSES:
AD Docket:
You may examine the AD docket at
regulations.gov
under Docket No. FAA-2025-0348; 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 W12-140, 1200 New Jersey Avenue SE, Washington, DC 20590.
Material Incorporated by Reference:
• For Boeing material identified in this AD, contact Boeing Commercial Airplanes, Attention: Contractual & Data Services (C&DS), 2600 Westminster Blvd., MC 110-SK57, Seal Beach, CA 90740-5600; telephone 562-797-1717; websitemyboeingfleet.com.
• You may view this material 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 206-231-3195. It is also available atregulations.gov
under Docket No. FAA-2025-0348.
FOR FURTHER INFORMATION CONTACT:
Raja Vengadasalam, Aviation Safety Engineer, FAA, 2200 South 216th St., Des Moines, WA 98198; phone: 206-231-3537; email:
raja.vengadasalam@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 777-200LR and -300ER series airplanes. The NPRM was published in the
Federal Register
on March 28, 2025 (90 FR 14055). The NPRM was prompted by reports of chafing and arcing damage on the LED sidewall wire bundles. In the NPRM, the FAA proposed to require a GVI of the sidewall light for chafing damage and applicable on-condition actions. The FAA is issuing this AD to address chafing damage on the LED sidewall wire bundles. The unsafe condition, if not addressed, could result in maintenance personnel contact with a live high-voltage electrical cable.
Discussion of Final Airworthiness Directive
Comments
The FAA received comments from Boeing and ProTech Aero Services Limited (ProTec…
Fonte: Federal Register (federalregister.gov). Texto original em inglês.