Airworthiness Directives; Rolls-Royce plc RB211-524 Series Turbofan Engines
airworthiness · Rule · Final rule; request for comments. · Published 2003-10-24 · Effective 2003-11-10 · 68 FR 60843
Document
Document number
03-26470
Federal Register citation
68 FR 60843
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
Rolls-Royce plc RB211-524 Series Turbofan
Publication date
2003-10-24
Effective date
2003-11-10
FAA docket
Docket No. 2003-NE-36-AD
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain Rolls-Royce plc (RR) RB211-524 series turbofan engines. This AD requires replacing the dedicated generator rotor assembly, the adaptor casing on the high speed gearbox (HSGB), and bearings with new design parts on certain engines. This AD is prompted by several reports of dedicated generator rotor assembly bearing failures. We are issuing this AD to prevent possible uncommanded engine acceleration with no reaction to throttle movement, which could result in uncontrollable asymmetric engine thrust levels during takeoff or climb.