# Proposed AD FAA-2010-0706: The Boeing Company Model 747-400, 747- 400D, and 747-400F Series Airplanes Equipped With General Electric CF6- 80C2 or Pratt & Whitney PW4000 Series Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2011-10-02
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 5, 2010, 75 FR 47245
- Comments due: September 20, 2010
- Became: [AD 2011-10-02](https://openairdocs.org/ad/2011-10-02)
- Docket: FAA-2010-0706 (https://www.regulations.gov/docket/FAA-2010-0706, where comments are filed)
- Project: 2010-NM-064-AD
- FR document: 2010-19287
- Official PDF: https://openairdocs.org/files/sha256/89/0d/890d082ae1190cd60293a7e4e76f3e2a150cf925aa6543d076447e4a6baa375a (from https://www.govinfo.gov/content/pkg/FR-2010-08-05/pdf/2010-19287.pdf)
- Federal Register: https://www.federalregister.gov/documents/2010/08/05/2010-19287/airworthiness-directives-the-boeing-company-model-747-400-747-400d-and-747-400f-series-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A3D25C8B4310DC558625777600669D2E.0001
- Page: https://openairdocs.org/proposed/FAA-2010-0706

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Model 747-400, 747-400D, and 747-400F series airplanes. This proposed AD would require modifying certain thrust reverser control system wiring to the flap control unit (FCU). This proposed AD results from a report of automatic retraction of the leading edge flaps due to indications transmitted to the FCU from the thrust reverser control system during takeoff. We are proposing this AD to prevent automatic retraction of the leading edge flaps during takeoff, which could result in reduced climb performance and consequent collision with terrain and obstacles or forced landing of the airplane.

## Notices in this docket

- Aug 5, 2010: Notice of proposed rulemaking (NPRM). (first notice), FR document 2010-19287, comments due Sep 20, 2010 (https://www.federalregister.gov/documents/2010/08/05/2010-19287/airworthiness-directives-the-boeing-company-model-747-400-747-400d-and-747-400f-series-airplanes)

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