# Proposed AD FAA-2013-0547: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2014-03-21
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: July 18, 2013, 78 FR 42895
- Comments due: September 3, 2013
- Became: [AD 2014-03-21](https://openairdocs.org/ad/2014-03-21)
- Docket: FAA-2013-0547 (https://www.regulations.gov/docket/FAA-2013-0547, where comments are filed)
- Project: 2013-NM-028-AD
- FR document: 2013-17253
- Official PDF: https://openairdocs.org/files/sha256/32/42/3242bc918f0b8fe1b4d0f70f25b07e63cc52629b620e129b424ed5b95277b6f5 (from https://www.govinfo.gov/content/pkg/FR-2013-07-18/pdf/2013-17253.pdf)
- Federal Register: https://www.federalregister.gov/documents/2013/07/18/2013-17253/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/EBC2B3992160DAB286257BAC00497A88.0001
- Page: https://openairdocs.org/proposed/FAA-2013-0547

## Summary

We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 727-200 and 727-200F series airplanes. This proposed AD is intended to complete certain mandated programs intended to support the airplane reaching its limit of validity (LOV) of the engineering data that support the established structural maintenance program. This proposed AD would require a one-time inspection for cracking of the pressure floor of both main wheel wells, and related investigative and corrective actions if necessary; and would require modifying the pressure floor of both main wheel wells. We are proposing this AD to prevent fatigue cracking in the pressure floor of the main wheel wells, which could lead to rapid loss of cabin pressurization.

## Notices in this docket

- Jul 18, 2013: Notice of proposed rulemaking (NPRM). (first notice), FR document 2013-17253, comments due Sep 3, 2013 (https://www.federalregister.gov/documents/2013/07/18/2013-17253/airworthiness-directives-the-boeing-company-airplanes)

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