# Proposed AD FAA-2021-1173: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2022-08-14
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: January 31, 2022, 87 FR 4826
- Comments due: March 17, 2022
- Became: [AD 2022-08-14](https://openairdocs.org/ad/2022-08-14)
- Docket: FAA-2021-1173 (https://www.regulations.gov/docket/FAA-2021-1173, where comments are filed)
- Project: AD-2021-00917-T
- FR document: 2022-01860
- Official PDF: https://openairdocs.org/files/sha256/f8/6d/f86d4349a1d5cf5995ae09eeb1682469779ab6cadddadddc7bfd974a3af61f1d (from https://www.govinfo.gov/content/pkg/FR-2022-01-31/pdf/2022-01860.pdf)
- Federal Register: https://www.federalregister.gov/documents/2022/01/31/2022-01860/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2022-01860-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2021-1173

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all The Boeing Company Model 747-8F series airplanes. This proposed AD was prompted by reports of fuselage crown stringer cracking between station (STA) 740 and STA 1000, stringer (S)-7 to S-12. This proposed AD would require repetitive detailed inspections for cracking of fuselage crown stringers and applicable on-condition actions. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Jan 31, 2022: Notice of proposed rulemaking (NPRM). (first notice), FR document 2022-01860, comments due Mar 17, 2022 (https://www.federalregister.gov/documents/2022/01/31/2022-01860/airworthiness-directives-the-boeing-company-airplanes)

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