As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE IN CRUISE FLIGHT BEGAN TO SMELL WHAT COULD ONLY DESCRIBE AS BURNING WIRES. ATTEMPTED TO ISOLATE THE SMELL BY TURNING OFF THE AIR CONDITIONING SYS WHICH SEEMED TO HELP. IMMEDIATELY LANDED BACK AT THE AIRPORT & CALLED THE MECHANIC. INSPECTED THE ACFT & FOUND THE AFT BLOWER EVAPORATOR MOTOR HARNESS BURNT AT ITS DISCONNECT UNDERNEATH THE AFT BELLY PANEL. REPAIRED THE CONNECTION TO THE BLOWER ASSEMBLY & RETURNED THIS ACFT TO SERVICE.