# Proposed AD FAA-2022-0154: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2022-18-11
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 25, 2022, 87 FR 17032
- Comments due: May 9, 2022
- Became: [AD 2022-18-11](https://openairdocs.org/ad/2022-18-11)
- Docket: FAA-2022-0154 (https://www.regulations.gov/docket/FAA-2022-0154, where comments are filed)
- Project: AD-2021-01153-T
- FR document: 2022-06319
- Official PDF: https://openairdocs.org/files/sha256/15/2b/152b91820454b249b1002e18d51cf77e26972c30e8d0b31c6abb3be66c861002 (from https://www.govinfo.gov/content/pkg/FR-2022-03-25/pdf/2022-06319.pdf)
- Federal Register: https://www.federalregister.gov/documents/2022/03/25/2022-06319/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2022-06319-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2022-0154

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all The Boeing Company Model 777 airplanes. This proposed AD was prompted by a report of a crack found in a front spar lower chord undergoing an underwing longeron replacement. This proposed AD would require repetitive inspections for cracking of the left and right side ring chords, repair angles, front spar lower chords, and front spar webs (depending on configuration) common to the underwing longeron located at station (STA) 1035; modification of the front spar lower chord for some airplanes; repetitive post-modification inspections; and applicable on-condition actions. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Mar 25, 2022: Notice of proposed rulemaking (NPRM). (first notice), FR document 2022-06319, comments due May 9, 2022 (https://www.federalregister.gov/documents/2022/03/25/2022-06319/airworthiness-directives-the-boeing-company-airplanes)

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