airworthiness · Rule · Final rule. · Published 2017-02-15 · Effective 2017-03-22 · 82 FR 10701
Document
Document number
2017-02921
Federal Register citation
82 FR 10701
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
Rolls-Royce plc Turbofan
Publication date
2017-02-15
Effective date
2017-03-22
FAA docket
Docket No. FAA-2012-1327
Abstract
We are superseding airworthiness directive (AD) 2014-16-10 for all Rolls-Royce plc (RR) RB211 Trent 768-60, 772-60, and 772B-60 turbofan engines. AD 2014-16-10 required initial and repetitive ultrasonic inspections (UIs) of the affected low-pressure (LP) compressor blades. This AD requires the UIs in AD 2014-16-10 while reducing the inspection threshold. This AD was prompted by revised service information to reduce the inspection threshold for UI of the LP compressor blades. We are issuing this AD to correct the unsafe condition on these products.