# Proposed AD FAA-2011-0044: The Boeing Company Model 767-200, -300, -300F, and -400ER Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2012-09-04
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: February 24, 2011, 76 FR 10288
- Comments due: April 11, 2011
- Became: [AD 2012-09-04](https://openairdocs.org/ad/2012-09-04)
- Docket: FAA-2011-0044 (https://www.regulations.gov/docket/FAA-2011-0044, where comments are filed)
- Project: 2010-NM-059-AD
- FR document: 2011-4200
- Official PDF: https://openairdocs.org/files/sha256/ca/00/ca00dd70c0305af3772595c6a371ee2890fdad473248c50caaf71bcd30e09fe9 (from https://www.govinfo.gov/content/pkg/FR-2011-02-24/pdf/2011-4200.pdf)
- Federal Register: https://www.federalregister.gov/documents/2011/02/24/2011-4200/airworthiness-directives-the-boeing-company-model-767-200--300--300f-and--400er-series-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B3E7E53911F757C286257841004F02CF.0001
- Page: https://openairdocs.org/proposed/FAA-2011-0044

## Summary

We propose to supersede an existing airworthiness directive (AD) that applies to The Boeing Company Model 767-200, -300, and -300F series airplanes. The existing AD currently requires inspections to detect cracking or corrosion of the fail-safe straps between the side fitting of the rear spar bulkhead at body station 955 and the skin; and follow-on and corrective actions. Since we issued that AD, we have received additional reports of cracks in 51 fail-safe straps on 41 airplanes; we have also received a report of a crack found in the "T'' fitting that connects the fail-safe strap to the outboard edge of the pressure deck. This proposed AD would expand the applicability, and would add an inspection for cracking in the fail-safe strap, and repair or replacement if necessary. We are proposing this AD to detect and correct fatigue cracking or corrosion of the fail-safe straps and the "T'' fittings, which could result in cracking of adjacent structure and consequent reduced structural integrity of the fuselage.

## Notices in this docket

- Feb 24, 2011: Notice of proposed rulemaking (NPRM). (first notice), FR document 2011-4200, comments due Apr 11, 2011 (https://www.federalregister.gov/documents/2011/02/24/2011-4200/airworthiness-directives-the-boeing-company-model-767-200--300--300f-and--400er-series-airplanes)

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