What was found
DURING FLIGHT TO HOSPITAL MEDICAL CREW NOTIFIED THE PILOT THAT THEY SMELLED FUMES FROM AN ELECTRICAL SOURCE IN THE CABIN BUT DID NOT SEE ANY SMOKE. AN OFF-SITE LANDING WAS PERFORMED, AND MAINTENANCE NOTIFIED OF THE DISCREPANCY. PILOT REPORTED NO ODOR OR FUMES DETECTED UP FRONT. ON CALL AMTS INSPECTED CABIN ELECTRICAL OUTLETS, MEDICAL EQUIPMENT POWER CORDS AND AIRFRAME CABIN WIRING WITH NO DEFECTS NOTED. STRONG ODOR EMANATING FROM CABIN AIR CONDITIONING OUTLETS LED TO DISCOVERING THE AFT BLOWER MOTOR TO BE SOURCE. PULLED CB, SECURED AND PLACARDED AIR CONDITIONING SYSTEM AS INOP. AIRCRAFT RETURNED TO BASE.