As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE SMELL IN THE COCKPIT. CREW DIVERTED TO STT AIRPORT. MAINTENANCE TRACED THE ISSUE TO THE AIR CONDITIONING COMPRESSOR BELT WHICH WAS REPLACED. SUBSEQUENTLY THE AIR CONDITIONING COMPRESSOR WAS FOUND TO BE SEIZED CAUSING THE BELT FAILURE.