What was found
(CAN) FLAP MOTOR OVERHEATNG, BURNING ODOR IN CABIN. FLAP MOTOR/GEARBOX ASSY REPLACED WITH OVERHAULED UNIT. VOLTAGE TO MOTOR CHKD & GROUND WIRE CHKD OKAY. CHKD FLAP SYS FOR BINDING, ACTUATORS, CABLES & FLAPS OPERATED WITHOUT BINDING. SYS CHKD FLAP MOTOR/GEARBOX ASSY, NO FAULTS NOTED. RIGGING CHKD OKAY. CONDUCTED A TEST FLT WITH FLAP MOTOR OBSERVED, FLAPS EXTENDED, & MOTOR RUNNING-ON, MOTOR HAD BURNING ODOR. DETERMINED IN FLT, WHEN FLAPS EXTENDED, DOWN LIMIT SWITCH ROLLER WENT OFF LIMIT SWITCH CAM PREVENTING FLAPS FROM STOPPING, FLAPS WENT TO END OF TRACKS & LOADED UP MOTOR. FLAP DOWN LIMIT SWITCH ADJUSTED. TEST FLT FAULT FREE. PREVIOUS MOTOR REPLACED, MOTOR HAD 94.2 HOURS SINCE OVERHAUL.