FAA Revises Continental Engine AD

The FAA announced Monday it has found an error in an airworthiness directive (AD) for Continental GTSIO-520 series engines targeting the starter adapter assembly and/or crankshaft gear on about 4,200 engines. As a result, the FAA is superseding that AD with a new proposed AD and expects that 25 percent of the affected engines will require an unscheduled “rough-running engine” inspection and “about half of the engines will require the bushing and TCM service kit.” [more] The cost associated with that service runs roughly $800, according to the FAA. Owners should also be prepared for possible multiple inspections and component replacements.