AD NUMBER: 2019-16-14

PRODUCT: All Rolls-Royce plc (RR) Trent 1000-A, Trent 1000-C, Trent 1000-D, Trent 1000-E, Trent 1000-G, and Trent 1000-H turbofan model engines.

ACTION: Final rule; request for comments.

SUMMARY: The FAA is superseding airworthiness directive (AD) 2018-25-01 for the products listed above.

AD 2018-25-01 required initial and repetitive inspections of the intermediate-pressure compressor (IPC) stage 1 rotor (R1) blades, IPC stage 2 rotor (R2) blades, and IPC shaft stage 2 dovetail posts, and removing any cracked parts from service.

This AD retains those inspections, revises certain reinspection intervals, and adds certain engine models to the applicability. This AD was prompted by a determination by the manufacturer of the need to revise inspection intervals for certain affected engines.

In addition, the FAA added recently validated additional engine models to the applicability.

DATES: This AD is effective September 11, 2019. Comments must be received by September 11, 2019.

COST: The FAA estimates that this AD affects 0 engines installed on airplanes of U.S. registry. Operators may incur the following costs in order to comply with this AD:

• Inspect IPC blades and dovetail posts: 20 work-hours × $85 per hour = $1700 per engine.

FMI: AD