# Proposed AD FAA-2015-8429: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2016-16-10
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: January 13, 2016, 81 FR 1577
- Comments due: February 29, 2016
- Became: [AD 2016-16-10](https://openairdocs.org/ad/2016-16-10)
- Docket: FAA-2015-8429 (https://www.regulations.gov/docket/FAA-2015-8429, where comments are filed)
- Project: 2015-NM-122-AD
- FR document: 2015-33172
- Official PDF: https://openairdocs.org/files/sha256/b8/b9/b8b9cd83a2e4f48febdfe839d69dcc726b824abd3cc1c4edbad64032c200f9e6 (from https://www.govinfo.gov/content/pkg/FR-2016-01-13/pdf/2015-33172.pdf)
- Federal Register: https://www.federalregister.gov/documents/2016/01/13/2015-33172/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A769E88C3B18DE4586257F3900542176.0001
- Page: https://openairdocs.org/proposed/FAA-2015-8429

## Summary

We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 747-100, 747-100B, 747-100B SUD, 747- 200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, 747SR, and 747SP series airplanes. This proposed AD was prompted by reports of fatigue cracks in the station 320 crown frame and in window post number 3. This proposed AD would require repetitive inspections for cracks and missing fasteners of the station 320 crown frame, cracks in the web and flange surfaces of the forward segment of window post number 3, and missing fasteners and cracks of the window upper sill; post- modification inspections for cracks of the window upper sill; one-time fastener rework; and related investigative and corrective actions if necessary. We are proposing this AD to detect and correct fatigue cracking and missing fasteners of the station 320 crown frame, cracking of the window post number 3, and cracking of the window upper sill, which could result in an in-flight decompression and a loss of structural integrity of the fuselage.

## Notices in this docket

- Jan 13, 2016: Notice of proposed rulemaking (NPRM). (first notice), FR document 2015-33172, comments due Feb 29, 2016 (https://www.federalregister.gov/documents/2016/01/13/2015-33172/airworthiness-directives-the-boeing-company-airplanes)

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