# Proposed AD FAA-2026-1339: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Comment period closed
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: February 25, 2026, 91 FR 9205
- Comments due: April 13, 2026
- Docket: FAA-2026-1339 (https://www.regulations.gov/docket/FAA-2026-1339, where comments are filed)
- Project: AD-2025-01162-T
- FR document: 2026-03782
- Official PDF: https://openairdocs.org/files/sha256/6a/5b/6a5b419183862248255f1a6960086ff62b094a4d37410f99a87f1be6fd597891 (from https://www.govinfo.gov/content/pkg/FR-2026-02-25/pdf/2026-03782.pdf)
- Federal Register: https://www.federalregister.gov/documents/2026/02/25/2026-03782/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2026-03782-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2026-1339

## 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.

## Notices in this docket

- Feb 25, 2026: Notice of proposed rulemaking (NPRM). (first notice), FR document 2026-03782, comments due Apr 13, 2026 (https://www.federalregister.gov/documents/2026/02/25/2026-03782/airworthiness-directives-the-boeing-company-airplanes)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.