# Proposed AD FAA-2025-3997: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2026-19-04
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 17, 2025, 90 FR 51216
- Comments due: January 2, 2026
- Became: [AD 2026-19-04](https://openairdocs.org/ad/2026-19-04)
- Docket: FAA-2025-3997 (https://www.regulations.gov/docket/FAA-2025-3997, where comments are filed)
- Project: AD-2025-01471-T
- FR document: 2025-20013
- Official PDF: https://openairdocs.org/files/sha256/35/8d/358daa30ed55eb458be25c2500449d64edb86a747b9f3fdaa4d48c5efb290348 (from https://www.govinfo.gov/content/pkg/FR-2025-11-17/pdf/2025-20013.pdf)
- Federal Register: https://www.federalregister.gov/documents/2025/11/17/2025-20013/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2025-20013-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2025-3997

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all The Boeing Company Model 777-200, -200LR, -300, -300ER, and 777F series airplanes. This proposed AD was prompted by a report of overheated alternating current motor pumps (ACMP) that caused a fire in the main landing gear (MLG) wheel well. This proposed AD would require a records check or inspection for any installed ACMP with a certain part number and applicable on-condition actions. This proposed AD would also prohibit the installation of affected parts. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Nov 17, 2025: Notice of proposed rulemaking (NPRM). (first notice), FR document 2025-20013, comments due Jan 2, 2026 (https://www.federalregister.gov/documents/2025/11/17/2025-20013/airworthiness-directives-the-boeing-company-airplanes)

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