# Proposed AD FAA-2007-28382: Boeing Model 727 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2008-04-10
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: July 6, 2007, 72 FR 36901
- Comments due: August 20, 2007
- Became: [AD 2008-04-10](https://openairdocs.org/ad/2008-04-10)
- Docket: FAA-2007-28382 (https://www.regulations.gov/docket/FAA-2007-28382, where comments are filed)
- Project: 2006-NM-179-AD
- FR document: E7-13115
- Official PDF: https://openairdocs.org/files/sha256/38/42/38424bf3b06198835885f7b91dc54141bb5cad58cbbfbfd7bc6509ca83a764e2 (from https://www.govinfo.gov/content/pkg/FR-2007-07-06/pdf/E7-13115.pdf)
- Federal Register: https://www.federalregister.gov/documents/2007/07/06/E7-13115/airworthiness-directives-boeing-model-727-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C9C2E30719B2B357862573100054FC82.0001
- Page: https://openairdocs.org/proposed/FAA-2007-28382

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all Boeing Model 727 airplanes. This proposed AD would require revising the FAA-approved maintenance program by incorporating new airworthiness limitations (AWLs) for fuel tank systems to satisfy Special Federal Aviation Regulation No. 88 requirements. This proposed AD would also require the initial inspection of a certain repetitive AWL inspection to phase in that inspection, and repair if necessary. This proposed AD results from a design review of the fuel tank systems. We are proposing this AD to prevent the potential for ignition sources inside fuel tanks caused by latent failures, alterations, repairs, or maintenance actions, which, in combination with flammable fuel vapors, could result in a fuel tank explosion and consequent loss of the airplane.

## Notices in this docket

- Jul 6, 2007: Notice of proposed rulemaking (NPRM). (first notice), FR document E7-13115, comments due Aug 20, 2007 (https://www.federalregister.gov/documents/2007/07/06/E7-13115/airworthiness-directives-boeing-model-727-airplanes)

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