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Sun, Sep 16, 2012

AD: Rolls-Royce plc Turbofan Engines

AD NUMBER: 2012-17-04

PRODUCT: All Rolls-Royce plc (RR) RB211-Trent 800 series turbofan engines.
SUBJECT: Airworthiness Directive 2012-17-04
ACTION: Final Rule

SUMMARY: This AD requires removing from service certain intermediate pressure (IP) turbine discs that have a serial number listed in this AD. This AD was prompted by RR performing an evaluation that determined that the current lives for certain IP turbine discs with a steel inclusion may fail before they reach their current mandatory life limits. The FAA is issuing this AD to prevent failure of the IP turbine disc, which could result in uncontained failure of the engine and damage to the airplane.

DATES: This AD becomes effective October 1, 2012. Comments on this AD must be received by October 29, 2012.

FMI: AD

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