# Proposed AD FAA-2011-1231: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2013-08-01
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 18, 2011, 76 FR 71472
- Comments due: January 3, 2012
- Became: [AD 2013-08-01](https://openairdocs.org/ad/2013-08-01)
- Docket: FAA-2011-1231 (https://www.regulations.gov/docket/FAA-2011-1231, where comments are filed)
- Project: 2011-NM-088-AD
- FR document: 2011-29800
- Official PDF: https://openairdocs.org/files/sha256/cd/d4/cdd4116f55478b7cf3214c4d0a7c2dcef2fb976b38a51017b55064231dacd101 (from https://www.govinfo.gov/content/pkg/FR-2011-11-18/pdf/2011-29800.pdf)
- Federal Register: https://www.federalregister.gov/documents/2011/11/18/2011-29800/airworthiness-directives-the-boeing-company-airplanes
- Page: https://openairdocs.org/proposed/FAA-2011-1231

## Summary

We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 737-600, -700, -700C, -800, -900, and -900ER series airplanes. This proposed AD would require inspecting to detect damage to the upper fire seals on the forward edge of the thrust reverser, where the fire seal contacts the 12-o'clock engine strut, and for correct stiffness and vent holes, and doing corrective actions if necessary; and installing a bracket for the fire seal. This proposed AD was prompted by reports of damaged fire seals on the forward edge of the thrust reverser. We are proposing this AD to detect and correct damage to the fire seals, which could result in damage to the strut structure and the thrust reverser firewall. Such damage could significantly deteriorate the protection capacity of the fire extinguishing system and result in an uncontrolled fire.

## Notices in this docket

- Nov 18, 2011: Notice of proposed rulemaking (NPRM). (first notice), FR document 2011-29800, comments due Jan 3, 2012 (https://www.federalregister.gov/documents/2011/11/18/2011-29800/airworthiness-directives-the-boeing-company-airplanes)

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