# Proposed AD FAA-2007-28378: Boeing Model 727 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2007-21-04
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 25, 2007, 72 FR 34646
- Comments due: August 9, 2007
- Became: [AD 2007-21-04](https://openairdocs.org/ad/2007-21-04)
- Docket: FAA-2007-28378 (https://www.regulations.gov/docket/FAA-2007-28378, where comments are filed)
- Project: 2007-NM-089-AD
- FR document: E7-12220
- Official PDF: https://openairdocs.org/files/sha256/fd/18/fd18fcfe0614f3e64d917b451bb43138d848c41bf50c3a5adae5aa8d3cc24b55 (from https://www.govinfo.gov/content/pkg/FR-2007-06-25/pdf/E7-12220.pdf)
- Federal Register: https://www.federalregister.gov/documents/2007/06/25/E7-12220/airworthiness-directives-boeing-model-727-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/725E7E4566B9E0F0862573050061DBB5.0001
- Page: https://openairdocs.org/proposed/FAA-2007-28378

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all Boeing Model 727 airplanes. This proposed AD would require doing an initial detailed inspection for cracks in the aft pressure bulkhead web; repairing any discrepancy; and doing repetitive detailed inspections, and doing related investigative actions, if necessary. This proposed AD results from reports of cracking in the aft pressure bulkhead web. We are proposing this AD to detect and correct a cracked pressure bulkhead web, which could result in rapid decompression of the airplane.

## Notices in this docket

- Jun 25, 2007: Notice of proposed rulemaking (NPRM). (first notice), FR document E7-12220, comments due Aug 9, 2007 (https://www.federalregister.gov/documents/2007/06/25/E7-12220/airworthiness-directives-boeing-model-727-airplanes)

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