# Proposed AD FAA-2016-3700: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2016-15-04
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 1, 2016, 81 FR 10533
- Comments due: April 15, 2016
- Became: [AD 2016-15-04](https://openairdocs.org/ad/2016-15-04)
- Docket: FAA-2016-3700 (https://www.regulations.gov/docket/FAA-2016-3700, where comments are filed)
- Project: 2015-NM-171-AD
- FR document: 2016-03695
- Official PDF: https://openairdocs.org/files/sha256/9f/12/9f127ac125c4397e0c407a0bf5a35204125dbb5f19d79a4846d5dfea6d065c4b (from https://www.govinfo.gov/content/pkg/FR-2016-03-01/pdf/2016-03695.pdf)
- Federal Register: https://www.federalregister.gov/documents/2016/03/01/2016-03695/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/338926B688BC591D86257F69005929E2.0001
- Page: https://openairdocs.org/proposed/FAA-2016-3700

## Summary

We propose to adopt a new airworthiness directive (AD) for all The Boeing Company Model 757-200 and -200CB series airplanes. This proposed AD was prompted by an evaluation by the design approval holder (DAH) indicating that the lap splices at stringer (S)-14R, lower fastener row, are subject to widespread fatigue damage (WFD). This proposed AD would require repetitive external dual frequency eddy current (DFEC) or internal high frequency eddy current (HFEC) inspections of the lap splice, inner skin fasteners, at S-14R, station (STA) 440 through STA 540, and corrective action if necessary. We are proposing this AD to detect and correct cracking of the fuselage skin lap splice. Such cracking could result in reduced structural integrity of the airplane.

## Notices in this docket

- Mar 1, 2016: Notice of proposed rulemaking (NPRM). (first notice), FR document 2016-03695, comments due Apr 15, 2016 (https://www.federalregister.gov/documents/2016/03/01/2016-03695/airworthiness-directives-the-boeing-company-airplanes)

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