What was found
INVESTIGATED REPORT OF FLAPS NOT EXTENDING FROM RETRACTED POSITION. FOUND K105 FLAP MOTOR DYNAMIC BRAKE RELAY STICKING AND FLAP GEARBOX MOTOR BINDING. REPLACED K105 DYNAMIC BRAKE RELAY AND FLAP GEARBOX MOTOR, FLAP SYSTEM OPERATIONAL CHECKS NORMAL. SUSPECT DYNAMIC BRAKE RELAY CONTACTS STICKING AND ALLOWING FLAP GEARBOX MOTOR TO CONTINUE RUNNING IN RETRACTION DIRECTION, CAUSING EXCESSIVE HEAT AND LOAD FAILURE OF MOTOR. DYNAMIC BRAKE RELAY EATON MODEL SM50D7, HAWKER BEECH CRAFT P/N 6046H39B. EATON CODE: MFD 0444. RECOMMEND AIRFRAME MANUFACTURER INVESTIGATE CURRENT FAILURE RATE OF NEWER MANUFACTURE KING AIR SERIES DYNAMIC BRAKE RELAYS TO SEE IF A RANDOM OCCURRENCE OR A WIDER FLEET PROBLEM.