AD Issued for GE/Walter M601 Engines - National Agricultural Aviation Association

The FAA has issued an Airworthiness Directive (AD 2024-03-05) superseding AD 2022-13-16 and AD 2022-14-12, which apply to all GE Aviation Czech s.r.o. (GEAC) (type certificate previously held by WALTER Engines a.s., Walter a.s., and MOTORLET a.s.) Model M601 engines.

AD 2022-13-13 (issued June 2022) required revising the airworthiness limitations section (ALS) of the existing engine maintenance manual (EMM) to incorporate a visual inspection of the centrifugal compressor case for cracks. AD 2022-14-12 (issued July 2022) required calculating the accumulated life and, if necessary, replacing the propeller shaft for certain model engines.

Since the FAA issued AD 2022-13-16 and AD 2022-14-12, the manufacturer revised the ALS of the existing EMM to introduce new and more restrictive tasks and limitations, expand the applicability to all Model M601 engines, and incorporate certain requirements addressed by AD 2021-13-07 (issued June 2021) and AD 2023-01-10 (issued February 2023), which prompted this proposed AD.

This superseding AD requires revising the ALS of the existing EMM and the operator’s existing approved engine maintenance or inspection program, as applicable, to incorporate new and more restrictive tasks and limitations, as specified in a European Union Aviation Safety Agency (EASA) AD 2023-0020.

This AD is effective April 17, 2024.