# Airworthiness Directives; Boeing Model 777-200LR Series Airplanes Powered by General Electric (GE) Model GE90-110B Engines, and Model 777-300ER Series Airplanes Powered by GE Model GE90-115B Engines
> **Rule** · Final rule; request for comments. · Published 2006-10-11 · Effective 2006-10-16 · 71 FR 59651
## Document
- **Document number:** E6-16670
- **Category:** airworthiness
- **Manufacturer:** Boeing Model 777-200LR Series
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 71 FR 59651
- **Publication date:** 2006-10-11
- **Effective date:** 2006-10-16
- **FAA docket:** Docket No. FAA-2006-26028
## Abstract

This document publishes in the Federal Register an amendment adopting airworthiness directive (AD) 2006-20-51 that was sent previously to all known U.S. owners and operators of certain Boeing Model 777-200LR and -300ER series airplanes by individual notices. This AD requires revising the Airplane Flight Manual to prohibit takeoffs at less than full-rated thrust. This AD is prompted by a report of two occurrences of engine thrust rollback (reduction) during takeoff. We are issuing this AD to prevent dual-engine thrust rollback, which could result in the airplane failing to lift off before reaching the end of the runway or failing to clear obstacles below the takeoff flight path.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2006/10/11/E6-16670/airworthiness-directives-boeing-model-777-200lr-series-airplanes-powered-by-general-electric-ge)
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