As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE FLIGHT, PILOT REPORTED THE ODOR OF SMOKE. WHEN AIR CONDITIONING TURNED OFF, ODOR WENT AWAY. MECHANIC FOUND COMPRESSOR PULLEY SEIZED AND BELT BURNED TO A POINT OF FAILURE. AIR CONDITIONING SYSTEM INSTALLED IAW STC SR09117RC-D.