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Fri, Jan 13, 2017

AD: Rolls-Royce plc Turbofan Engines

AD NUMBER: 2017-01-01

PRODUCT: All Rolls-Royce plc (RR) RB211-Trent 970-84, RB211-Trent 970B-84, RB211-Trent 972-84, RB211-Trent 972B-84, RB211-Trent 977-84, RB211-Trent 977B-84, and RB211-Trent 980-84 turbofan engines.

ACTION: Final Rule; request for comments

SUMMARY: The FAA is superseding airworthiness directive (AD) 2014-05-25 for the engines listed above.

AD 2014-05-25 required inspections of the low-pressure turbine (LPT) exhaust case and support assembly or tail bearing housing (TBH) to detect cracks or damage.

This AD modifies the inspection schedule for the affected engines and adds an optional terminating action. This AD was prompted by RR performing additional analysis of inspection results and determining that the existing inspections need to be modified.

The FAA is issuing this AD to correct the unsafe condition on these products.

DATES: This AD is effective January 26, 2017. Comments must be received by February 27, 2017.

FMI: AD

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