Superseding AD Proposed for GE Engine M601 Compressor Case

The FAA has proposed to supersede Airworthiness Directive (AD) 2024-06-02 (dated April 11, 2024), which applies to several GE Aviation Czech M601 turboprop engines. Prompted by a report of a crack on the centrifugal compressor case mount pad weld area caused by poor welds, AD 2024-06-02 requires a detailed visual inspection (DVI) and, if necessary, replacement of the compressor case. 

Since AD 2024-06-02 was issued, the European Union Aviation Safety Agency has issued EASA AD 2024-0194 (dated October 15, 2024), which adds repetitive DVIs at intervals not to exceed 100 flight-hours, or 300 takeoffs or 6 months, whichever occurs first. If a crack is detected, the compressor case must be replaced. 

FAA’s proposed superseding AD would include all requirements from the EASA AD. Comments may be submitted through June 9, 2025.