# Proposed AD FAA-2021-0963: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2022-06-11
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 28, 2021, 86 FR 73688
- Comments due: January 27, 2022
- Became: [AD 2022-06-11](https://openairdocs.org/ad/2022-06-11)
- Docket: FAA-2021-0963 (https://www.regulations.gov/docket/FAA-2021-0963, where comments are filed)
- Project: AD-2021-01026-T
- FR document: 2021-27839
- Official PDF: https://openairdocs.org/files/sha256/ad/0a/ad0aa2bdd8fbb59e9c0c398584a15399dfe6130769d40e7972fe27f045ef004b (from https://www.govinfo.gov/content/pkg/FR-2021-12-28/pdf/2021-27839.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/12/28/2021-27839/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2021-27839-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2021-0963

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 777-200 and -300 series airplanes. This proposed AD was prompted by reports of three incidents involving in-flight fan blade failures on certain Pratt & Whitney engines (''fan blades'' are also known as ''1st-stage low-pressure compressor (LPC) blades''--these terms are used interchangeably in this proposed AD). This proposed AD would require modifying the engine inlet to withstand fan blade failure event loads. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Dec 28, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-27839, comments due Jan 27, 2022 (https://www.federalregister.gov/documents/2021/12/28/2021-27839/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.