# Proposed AD FAA-2017-0779: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2018-11-13
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 25, 2017, 82 FR 40511
- Comments due: October 10, 2017
- Became: [AD 2018-11-13](https://openairdocs.org/ad/2018-11-13)
- Docket: FAA-2017-0779 (https://www.regulations.gov/docket/FAA-2017-0779, where comments are filed)
- FR document: 2017-17543
- Official PDF: https://openairdocs.org/files/sha256/3b/76/3b761cde21a90f390c3bd20a512fe9bf348ae0fa873c181b89c5d731ef52d0c5 (from https://www.govinfo.gov/content/pkg/FR-2017-08-25/pdf/2017-17543.pdf)
- Federal Register: https://www.federalregister.gov/documents/2017/08/25/2017-17543/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/11151A711CADE2E2862581870052EE31.0001
- Page: https://openairdocs.org/proposed/FAA-2017-0779

## Summary

We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 787-8 airplanes. This proposed AD was prompted by reports of degraded bond-line performance of co-bonded upper wing stringer-to-skin joints. This proposed AD would require repetitive inspections of certain upper wing stringers for any disbond and corrective actions, if necessary; and a terminating preventative modification of installing disbond arrestment (DBA) fasteners. This proposed AD would also require revising the inspection or maintenance program to incorporate an airworthiness limitation. We are proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Aug 25, 2017: Notice of proposed rulemaking (NPRM). (first notice), FR document 2017-17543, comments due Oct 10, 2017 (https://www.federalregister.gov/documents/2017/08/25/2017-17543/airworthiness-directives-the-boeing-company-airplanes)

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