# Proposed AD FAA-2005-21434: Boeing Model 727 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2007-12-14
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 14, 2005, 70 FR 34405
- Comments due: July 29, 2005
- Became: [AD 2007-12-14](https://openairdocs.org/ad/2007-12-14)
- Docket: FAA-2005-21434 (https://www.regulations.gov/docket/FAA-2005-21434, where comments are filed)
- Project: 2004-NM-75-AD
- FR document: 05-11708
- Official PDF: https://openairdocs.org/files/sha256/67/ed/67ed6e27ebbded0565d3deb0090b1e2f0cc4106309c27fff0649fc142cc9b95c (from https://www.govinfo.gov/content/pkg/FR-2005-06-14/pdf/05-11708.pdf)
- Federal Register: https://www.federalregister.gov/documents/2005/06/14/05-11708/airworthiness-directives-boeing-model-727-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C886D40A58839C3086257020006B7814.0001
- Page: https://openairdocs.org/proposed/FAA-2005-21434

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all Boeing Model 727 airplanes. This proposed AD would require repetitive inspections for cracks of the body skin, doubler, and bear strap at the forward edge of the upper and lower hinge cutouts of the forward entry door, related investigative actions, and corrective action if necessary. This proposed AD also would require a preventive modification. This proposed AD is prompted by reports of skin and bear strap cracks at hinge cutouts. We are proposing this AD to detect and correct cracks in the skin and bear strap at the hinge cutouts of the forward entry door, which could result in rapid decompression of the airplane.

## Notices in this docket

- Jun 14, 2005: Notice of proposed rulemaking (NPRM). (first notice), FR document 05-11708, comments due Jul 29, 2005 (https://www.federalregister.gov/documents/2005/06/14/05-11708/airworthiness-directives-boeing-model-727-airplanes)

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