AD NUMBER: 2018-09-05

PRODUCT: Boeing 787-8 and 787-9 airplanes powered by Rolls-Royce plc (RR) Trent 1000-A2, Trent 1000-AE2, Trent 1000-C2, Trent 1000-CE2, Trent 1000-D2, Trent 1000-E2, Trent 1000-G2, Trent 1000-H2, Trent 1000-J2, Trent 1000-K2, and Trent 1000-L2 turbofan engines.

ACTION: Final rule; request for comments.

SUMMARY:  This AD requires revising the airplane flight manual (AFM) to limit extended operations (ETOPS).

This AD was prompted by a report from the engine manufacturer indicating that after an engine failure, prolonged operation at high thrust settings on the remaining engine during an ETOPS diversion may result in failure of the remaining engine before the diversion can be safely completed. The FAA has determined that updated AFM limitations are needed to minimize the potential for intermediate pressure compressor (IPC) blade failures under certain conditions.

DATES: This AD is effective April 26, 2018. Comments must be received by June 11, 2018.

COST: The FAA estimates that this AD affects 14 airplanes of U.S. registry. The cost of compliance is estimated to be $85 per aircraft for AFM revisions.

FMI: AD