The FAA proposes to adopt a new airworthiness directive (AD) for all GE/Walter M601D-11 model turboprop engines. This proposed AD would require revising the airworthiness limitation section of the existing engine maintenance manual to incorporate a visual inspection of the centrifugal compressor case for cracks every 100 hours. An owner/operator (pilot) holding a least a private pilot certificate may make this revision.
To read the complete proposed AD, click here. Comments on this proposed AD are due by May 31. To submit comments, click here.