# Proposed AD FAA-2015-0495: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2016-06-04
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 24, 2015, 80 FR 15523
- Comments due: May 8, 2015
- Became: [AD 2016-06-04](https://openairdocs.org/ad/2016-06-04)
- Docket: FAA-2015-0495 (https://www.regulations.gov/docket/FAA-2015-0495, where comments are filed)
- Project: 2014-NM-172-AD
- FR document: 2015-06574
- Official PDF: https://openairdocs.org/files/sha256/be/48/be485d3c635f86cd3a256b8e9c13274a22093426108c3117ed225305076e1483 (from https://www.govinfo.gov/content/pkg/FR-2015-03-24/pdf/2015-06574.pdf)
- Federal Register: https://www.federalregister.gov/documents/2015/03/24/2015-06574/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C1302A9BF883283B86257E12004A2557.0001
- Page: https://openairdocs.org/proposed/FAA-2015-0495

## Summary

We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 737-300, -400, and -500 series airplanes. This proposed AD was prompted by reports of cracking at certain fastener locations in the window corners of the window belt area. This proposed AD would require repetitive high frequency eddy current (HFEC) inspections for fatigue cracking in certain fastener locations in the window corners of the window belt area, and related investigative and corrective actions if necessary. This proposed AD would also provide an optional preventive modification that would terminate the repetitive inspections at the modified location. We are proposing this AD to detect and correct fatigue cracking around fastener locations that could cause multiple window corner skin cracks, which could result in rapid decompression and loss of structural integrity of the airplane.

## Notices in this docket

- Mar 24, 2015: Notice of proposed rulemaking (NPRM). (first notice), FR document 2015-06574, comments due May 8, 2015 (https://www.federalregister.gov/documents/2015/03/24/2015-06574/airworthiness-directives-the-boeing-company-airplanes)

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