airworthiness · Rule · Final rule. · Published 2014-08-19 · Effective 2014-09-23 · 79 FR 48961
Document
Document number
2014-19017
Federal Register citation
79 FR 48961
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
Rolls-Royce plc Turbofan
Publication date
2014-08-19
Effective date
2014-09-23
FAA docket
Docket No. FAA-2012-1327
Abstract
We are superseding airworthiness directive (AD) 2013-12-01 for all Rolls-Royce plc (RR) model RB211 Trent 768-60, 772-60, and 772B-60 turbofan engines. AD 2013-12-01 required a one-time ultrasonic inspection (UI) of low-pressure (LP) compressor blades with more than 2,500 flight cycles since new or last inspection. This AD requires initial and repetitive UIs of the affected LP compressor blades. This AD was prompted by LP compressor blade partial airfoil release events. We are issuing this AD to prevent LP compressor blade airfoil separations, damage to the engine, and damage to the airplane.