# Proposed AD FAA-2012-0809: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2013-04-04
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 16, 2012, 77 FR 49396
- Comments due: October 1, 2012
- Became: [AD 2013-04-04](https://openairdocs.org/ad/2013-04-04)
- Docket: FAA-2012-0809 (https://www.regulations.gov/docket/FAA-2012-0809, where comments are filed)
- Project: 2011-NM-135-AD
- FR document: 2012-20108
- Official PDF: https://openairdocs.org/files/sha256/dd/34/dd34a9806d405ff293fba3f689cb5a96712f6d2a210e8df3b5680596ed066973 (from https://www.govinfo.gov/content/pkg/FR-2012-08-16/pdf/2012-20108.pdf)
- Federal Register: https://www.federalregister.gov/documents/2012/08/16/2012-20108/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/986DE20829EC2F9D86257A5C004B0B7A.0001
- Page: https://openairdocs.org/proposed/FAA-2012-0809

## Summary

We propose to supersede an existing airworthiness directive (AD) that applies to certain The Boeing Company Model 757 airplanes equipped with Rolls-Royce RB211-535E engines. The existing AD currently requires repetitive inspections for signs of damage of the aft hinge fittings and attachment bolts of the thrust reversers, and related investigative and corrective actions if necessary. The existing AD also provides for an optional terminating modification for the repetitive inspections. Since we issued the existing AD, we have received reports of incorrectly installed washers under the attachment bolts of the aft hinge fittings of the thrust reversers. For certain airplanes, this proposed AD would add a one-time inspection of the washers installed under the attachment bolts of the aft hinge fittings for correct installation sequence, and reinstallation if necessary. This proposed AD also adds an option for installing a redesigned aft hinge fitting with the trim already done, instead of trimming an existing or new hinge fitting, which is included in the existing optional terminating modification. We are proposing this AD to prevent failure of the attachment bolts and consequent separation of a thrust reverser from the airplane during flight, which could result in structural damage to the airplane.

## Notices in this docket

- Aug 16, 2012: Notice of proposed rulemaking (NPRM). (first notice), FR document 2012-20108, comments due Oct 1, 2012 (https://www.federalregister.gov/documents/2012/08/16/2012-20108/airworthiness-directives-the-boeing-company-airplanes)

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