2016-26334: Airworthiness Directives; Rolls-Royce plc Turbofan Engines
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We propose to supersede airworthiness directive (AD) 2014-16- 10 that applies to all Rolls-Royce plc (RR) RB211 Trent 768-60, 772-60, and 772B-60 turbofan engines. AD 2014-16-10 requires initial and repetitive ultrasonic inspections (UIs) of the affected low-pressure (LP) compressor blades. Since we issued AD 2014-16-10, RR issued revised service information to reduce the inspection threshold. This proposed AD would retain the UIs in AD 2014-16-10 while applying the revised inspection threshold. We are proposing this AD to prevent LP compressor blade airfoil separations, damage to the engine, and damage to the airplane.
The agency’s own summary, as published.
What this changes
Amends 1 part of the Code of Federal Regulations — the standing rules this notice rewrites.
Rulemaking docket
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