What was found
(CAN) - IN FLIGHT, FLAPS SELECTED, FLAPS DID NOT RESPOND. ON GROUND CHECKED ELECTRICAL CONNECTIONS & TESTED. FOUND THAT THE FLAPS EXTENDED, BUT WOULD NOT RETRACT FULLY. ISOLATED PROBLEM TO STRIPPED REDUCTION GEAR BOX AS FLAPS COULD BE HELD IN POSITION BY HAND AND MOTOR WOULD RUN MOVING CAM TO LIMIT SWITCHES AND FLAPS WOULD NOT MOVE UNLESS LET GO (FREE RUN) WITH TENSION ON FLAPS AS IN FLIGHT, INPUTED SELECTION WOULD ONLY ROTATE CAM UNTIL CONTACT WITH WITH MICRO / UNIT SWITCHES MADE. REMOVED GEAR BOX OPENED UP AND FOUND CRACKED GEAR.