What was found
PILOT CALLED ME THAT THEY LANDED AT BULLHEAD CITY MAINTENANCE AND HAD THE SMELL OF SMOKE IN THE CABIN. ARRIVED AT AIRPORT TALKED WITH PILOT STATED THAT THEY SMELLED IT IN FLIGHT TURNED OFF AIR CONDITIONING SYSTEM AND THE SMELL WENT AWAY. PUT AIRCRAFT IN THE HANGER RAN AC SYSTEM THE SMELL WAS NOTICEABLE FROM THE CEILING VENTS. COULD NOT PIN POINT WHERE IT WAS COMING FROM. REMOVED THE MEDICAL WALL DID NOT FIND ANY ISSUE DECIDED TO REPLACE AFT FAN MOTOR AS A PRECAUTION. ONCE FAN WAS REMOVED AND DISASSEMBLED FOUND THAT THE WINDINGS ON THE MOTOR STARTED COMING APART.