Airworthiness Directive · Amendment 39-14786 · 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
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
Superseded. A later AD replaced this one: AD 2006-20-51 R1. Comply with the one in force.
This AD applies to airplanes in Table 1 of this AD certificated in any category.
| Boeing model | Powered by General Electric (GE) model |
|---|---|
| (1) 777-200LR series airplanes | GE90-110B engines. |
| (2) 777-300ER series airplanes | GE90-115B engines. |
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.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Within 24 hours after the effective date of this AD, revise the Certificate Limitations Section of the AFM to include the following statement. This may be done by inserting a copy of this AD into the AFM.
“Use of reduced thrust takeoff ratings determined by either the assumed temperature method or the fixed de-rate method or a combination of both, is prohibited. Full-rated thrust must be used for takeoff.”
Note 1: When a statement identical to that in paragraph (f) of this AD has been included in the general revisions of the AFM, the general revisions may be inserted into the AFM, and the copy of this AD may be removed from the AFM.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
