# Proposed AD FAA-2011-1257: the Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2012-12-19
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 30, 2011, 76 FR 74012
- Comments due: January 17, 2012
- Became: [AD 2012-12-19](https://openairdocs.org/ad/2012-12-19)
- Docket: FAA-2011-1257 (https://www.regulations.gov/docket/FAA-2011-1257, where comments are filed)
- Project: 2011-NM-124-AD
- FR document: 2011-30821
- Official PDF: https://openairdocs.org/files/sha256/35/d3/35d3ec4a7f21f61e907133ecb6024f362678bbbbf66a86ba1a50d1e623911258 (from https://www.govinfo.gov/content/pkg/FR-2011-11-30/pdf/2011-30821.pdf)
- Federal Register: https://www.federalregister.gov/documents/2011/11/30/2011-30821/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6023FDD9479E0AD486257958004809D1.0001
- Page: https://openairdocs.org/proposed/FAA-2011-1257

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Boeing Company Model 777-200, -200LR, and -300ER series airplanes. This proposed AD was prompted by a report from the manufacturer indicating that the lowered ceiling support structure of Section 41, in airplanes incorporating the overhead space utilization (OSU) option, was found to be under-strength when subjected to a 9.0 g forward load. This proposed AD would require installing new structural members in and new tie rod(s) and attach fittings on the left and right sides of the lowered ceiling support structure. We are proposing this AD to prevent the forward lowered ceiling panels and support structure from becoming dislodged during an occurrence of a 9.0 g forward load and consequent injury to personnel or interference with an emergency evacuation.

## Notices in this docket

- Nov 30, 2011: Notice of proposed rulemaking (NPRM). (first notice), FR document 2011-30821, comments due Jan 17, 2012 (https://www.federalregister.gov/documents/2011/11/30/2011-30821/airworthiness-directives-the-boeing-company-airplanes)

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