# Proposed AD FAA-2021-0664: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2022-03-21
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 6, 2021, 86 FR 55538
- Comments due: November 22, 2021
- Became: [AD 2022-03-21](https://openairdocs.org/ad/2022-03-21)
- Docket: FAA-2021-0664 (https://www.regulations.gov/docket/FAA-2021-0664, where comments are filed)
- Project: AD-2021-00158-T
- FR document: 2021-21787
- Official PDF: https://openairdocs.org/files/sha256/72/7e/727ea3cf8863ec35f92bfd4232b531b74c015bafc7a5bb0f34c511071b077031 (from https://www.govinfo.gov/content/pkg/FR-2021-10-06/pdf/2021-21787.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/10/06/2021-21787/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A127B244A96FCCE9862587660057CA61.0001
- Page: https://openairdocs.org/proposed/FAA-2021-0664

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 787-8, 787-9, and 787-10 airplanes. This proposed AD was prompted by significant changes, including new or more restrictive requirements, made to the airworthiness limitations (AWLs) related to fuel tank ignition prevention and the nitrogen generation system. This proposed AD would require revising the existing maintenance or inspection program, as applicable, to incorporate new or more restrictive airworthiness limitations. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Oct 6, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-21787, comments due Nov 22, 2021 (https://www.federalregister.gov/documents/2021/10/06/2021-21787/airworthiness-directives-the-boeing-company-airplanes)

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