# Proposed AD FAA-2013-0326: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2014-05-13
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 15, 2013, 78 FR 22215
- Comments due: May 30, 2013
- Became: [AD 2014-05-13](https://openairdocs.org/ad/2014-05-13)
- Docket: FAA-2013-0326 (https://www.regulations.gov/docket/FAA-2013-0326, where comments are filed)
- Project: 2012-NM-089-AD
- FR document: 2013-08768
- Official PDF: https://openairdocs.org/files/sha256/5f/2c/5f2c95ce99e33136db1f4d4f83287c8923bc5d21b0f65ae6e3d781f3b8b73345 (from https://www.govinfo.gov/content/pkg/FR-2013-04-15/pdf/2013-08768.pdf)
- Federal Register: https://www.federalregister.gov/documents/2013/04/15/2013-08768/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DF98BC3393B7D82086257B4E004E426C.0001
- Page: https://openairdocs.org/proposed/FAA-2013-0326

## Summary

We propose to supersede an existing airworthiness directive (AD) that applies to certain The Boeing Company Model 757 series airplanes equipped with Rolls-Royce RB211 engines. The existing AD currently requires modification of the nacelle strut and wing structure; for certain airplanes, repetitive detailed inspections of certain aft bulkhead fasteners for loose or missing fasteners, and corrective action if necessary. For certain other airplanes, the existing AD requires a one-time detailed inspection of the middle gusset of the inboard side load fitting for proper alignment, and realignment if necessary; a one-time eddy current inspection of certain fastener holes for cracking, and repair if necessary; a detailed inspection of certain fasteners for loose or missing fasteners; and replacement with new fasteners if necessary. Since we issued that AD, a compliance time error was discovered, which could allow an airplane to exceed the acceptable compliance time for addressing theunsafe condition. This proposed AD would specify a maximum compliance time limit. We are proposing this AD to prevent fatigue cracking in primary strut structure and consequent reduced structural integrity of the strut.

## Notices in this docket

- Apr 15, 2013: Notice of proposed rulemaking (NPRM). (first notice), FR document 2013-08768, comments due May 30, 2013 (https://www.federalregister.gov/documents/2013/04/15/2013-08768/airworthiness-directives-the-boeing-company-airplanes)

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