FAA · Airworthiness Directive
Airworthiness Directives; The Boeing Company Airplanes
Abstract
The FAA proposes to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 777-200, -200LR, -300, -300ER, and 777F series airplanes. This proposed AD was prompted by reports of cracks found on the main landing gear (MLG) support beam lower stabilizer brace aft fitting lower flange attachment holes. This proposed AD would require repetitive inspections of the MLG support beam lower stabilizer brace aft fittings for any crack; repetitive inspections of the MLG support beams and lower stabilizer braces for any damage; repetitive inspections of the MLG support beams and the upper and lower flanges of the MLG support beam lower stabilizer brace aft fittings for any crack, or repetitive inspections of the upper and lower flange surfaces of the MLG support beam lower stabilizer brace aft fittings for any crack; and applicable on-condition corrective actions. The FAA is proposing this AD to address the unsafe condition on these products.
Applicability
Aircraft makes and models this AD applies to, sorted by US-registered fleet size.
Federal Register text
Verbatim from the Federal Register publication — required actions, compliance times, parts/serial numbers, and methods of compliance. The Federal Register is the legally binding document; this rendering is for readability. Cite: 91 FR 9205.
[Federal Register Volume 91, Number 37 (Wednesday, February 25, 2026)] [Proposed Rules] [Pages 9205-9207] From the Federal Register Online via the Government Publishing Office [www.gpo.gov] [FR Doc No: 2026-03782]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2026-1339; Project Identifier AD-2025-01162-T] RIN 2120-AA64
Airworthiness Directives; The Boeing Company Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking (NPRM).
-----------------------------------------------------------------------
SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 777-200, -200LR, -300, -300ER, and 777F series airplanes. This proposed AD was prompted by reports of cracks found on the main landing gear (MLG) support beam lower stabilizer brace aft fitting lower flange attachment holes. This proposed AD would require repetitive inspections of the MLG support beam lower stabilizer brace aft fittings for any crack; repetitive inspections of the MLG support beams and lower stabilizer braces for any damage; repetitive inspections of the MLG support beams and the upper and lower flanges of the MLG support beam lower stabilizer brace aft fittings for any crack, or repetitive inspections of the upper and lower flange surfaces of the MLG support beam lower stabilizer brace aft fittings for any crack; and applicable on-condition corrective actions. The FAA is proposing this AD to address the unsafe condition on these products.
DATES: The FAA must receive comments on this proposed AD by April 13, 2026.
ADDRESSES: You may send comments, using the procedures found in 14 CFR 11.43 and 11.45, by any of the following methods: Federal eRulemaking Portal: Go to regulations.gov. Follow the instructions for submitting comments. Fax: 202-493-2251. Mail: U.S. Department of Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE, Washington, DC 20590. Hand Delivery: Deliver to Mail address above between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. AD Docket: You may examine the AD docket at regulations.gov under Docket No. FAA-2026-1339; 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 NPRM, any comments received, and other information. The street address for Docket Operations is listed above. Material Incorporated by Reference: For Boeing material identified in this proposed 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; website myboeingfleet.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 at regulations.gov under Docket No. FAA-2026-1339.
FOR FURTHER INFORMATION CONTACT: Camille Seay, Aviation Safety Engineer, FAA, 2200 South 216th St., Des Moines, WA 98198; phone: 817- 222-5149; email: [email protected].