HONEYWELL TPE331-10 and TPE331-11 engines [Docket No. FAA-2011-0789; Directorate Identifier 2011-NE-04-AD] – This proposed AD would require operators to conduct an initial fluorescent-penetrant inspection and repetitive eddy-current inspections of certain first-stage turbine disks to determine if they are cracked. If any cracks were found, the cracked disks would need to be removed from service, per the instructions of Honeywell International Alert Service Bulletin TPE331-72-A2156 (dated ...
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