# Proposed AD FAA-2015-3146: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2016-04-17
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 25, 2015, 80 FR 51488
- Comments due: October 9, 2015
- Became: [AD 2016-04-17](https://openairdocs.org/ad/2016-04-17)
- Docket: FAA-2015-3146 (https://www.regulations.gov/docket/FAA-2015-3146, where comments are filed)
- Project: 2014-NM-249-AD
- FR document: 2015-20853
- Official PDF: https://openairdocs.org/files/sha256/a2/c0/a2c0bbc8618b45142ae01646dfa400eea45b169c7ca6dd67189f7fa8e68fa2ca (from https://www.govinfo.gov/content/pkg/FR-2015-08-25/pdf/2015-20853.pdf)
- Federal Register: https://www.federalregister.gov/documents/2015/08/25/2015-20853/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B0DBB189A79C624186257EAC004CDE70.0001
- Page: https://openairdocs.org/proposed/FAA-2015-3146

## Summary

We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 777-200 series airplanes. This proposed AD was prompted by an evaluation by the design approval holder (DAH) indicating that the skin lap splices at certain stringers in certain fuselage sections are subject to widespread fatigue damage (WFD). This proposed AD would require inspections to detect cracking of fuselage skin lap splices in certain fuselage sections, and corrective actions if necessary; modification of left-side and right-side lap splices; and post-modification repetitive inspections for cracks in the modified lap splices, and corrective actions if necessary. We are proposing this AD to detect and correct fatigue cracking of the skin lap splices, and consequent risk of sudden decompression and the inability to sustain limit flight and pressure loads.

## Notices in this docket

- Aug 25, 2015: Notice of proposed rulemaking (NPRM). (first notice), FR document 2015-20853, comments due Oct 9, 2015 (https://www.federalregister.gov/documents/2015/08/25/2015-20853/airworthiness-directives-the-boeing-company-airplanes)

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