# Proposed AD FAA-2022-1312: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2023-08-05
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 8, 2022, 87 FR 75179
- Comments due: January 23, 2023
- Became: [AD 2023-08-05](https://openairdocs.org/ad/2023-08-05)
- Docket: FAA-2022-1312 (https://www.regulations.gov/docket/FAA-2022-1312, where comments are filed)
- Project: AD-2022-00551-T
- FR document: 2022-26591
- Official PDF: https://openairdocs.org/files/sha256/fa/a7/faa7a0638fdef2c9cd6d0fa4e47b264c35b3eb6866b18f14ffef6e3dc22e3d1c (from https://www.govinfo.gov/content/pkg/FR-2022-12-08/pdf/2022-26591.pdf)
- Federal Register: https://www.federalregister.gov/documents/2022/12/08/2022-26591/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2022-26591-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2022-1312

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 777 airplanes. This proposed AD was prompted by reports of cracks found in the station (STA) 2370 pivot bulkhead forward outer chord. Analysis revealed higher bending stresses across the chord than originally assessed. This proposed AD would require repetitive detailed and high frequency eddy current (HFEC) inspections of the STA 2370 pivot bulkhead forward outer chord and longeron fitting for cracking and applicable on-condition actions. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Dec 8, 2022: Notice of proposed rulemaking (NPRM). (first notice), FR document 2022-26591, comments due Jan 23, 2023 (https://www.federalregister.gov/documents/2022/12/08/2022-26591/airworthiness-directives-the-boeing-company-airplanes)

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