# Proposed AD FAA-2021-0685: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2022-08-12
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 9, 2021, 86 FR 50485
- Comments due: October 25, 2021
- Became: [AD 2022-08-12](https://openairdocs.org/ad/2022-08-12)
- Docket: FAA-2021-0685 (https://www.regulations.gov/docket/FAA-2021-0685, where comments are filed)
- Project: AD-2021-00432-T
- FR document: 2021-19460
- Official PDF: https://openairdocs.org/files/sha256/28/fc/28fcc717f24f2bcde2354a36ad0144ecde5e0db51a7515e5b770d94bcdb29d9d (from https://www.govinfo.gov/content/pkg/FR-2021-09-09/pdf/2021-19460.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/09/09/2021-19460/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/98E1F622C41D081B8625874C0052CF88.0001
- Page: https://openairdocs.org/proposed/FAA-2021-0685

## Summary

The FAA proposes to supersede Airworthiness Directive (AD) 2020-21-17, which applies to all The Boeing Company Model 757 airplanes. AD 2020-21-17 requires repetitive inspections for skin cracking and shim migration at the upper link drag fittings, diagonal brace cracking, and fastener looseness; and applicable on-condition actions. Since the FAA issued AD 2020-21-17, a determination has been made that the compliance times for certain groups are not adequate. This proposed AD would retain the requirements of AD 2020-21-17 with reduced compliance times for certain airplane groups. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Sep 9, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-19460, comments due Oct 25, 2021 (https://www.federalregister.gov/documents/2021/09/09/2021-19460/airworthiness-directives-the-boeing-company-airplanes)

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