What was found
HELICOPTER TAKING OFF, WENT TO RETRACT LANDING GEAR AND HAD A RED GEAR UNLOCKED LIGHT. PILOTS FOLLOWED PROCEDURE, FLEW AIRCRAFT BACK TO DEPARTURE. AIRCRAFT LANDED UNEVENTFULLY, AFTER AIRCRAFT WAS SHUTDOWN MAINTENANCE FOUND RT GEAR DOOR RETRACTION/EXTENSION LINK SWIVEL ON MAIN GEAR ASSY SHEARED. PART POSSIBLY HAD A SMALL UNDETECTABLE CRACK FOR SOMETIME WHICH EVENTFULLY LDE TO A SHEARED CONDITION. RECOMMENDATION MIGHT BE AN ANNUAL DYE PENETRANT INSPECTION AROUND BASE OF SWIVEL FITTING. (EA25200604717) (K)