As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT AND CREW REPORTED A BURNING ODOR IN FLIGHT WITH THE AIR CONDITIONING FAN ON. UPON MAINTENANCE INSPECTION FOUND AIR CONDITIONER COMPRESSOR DRIVE PULLEY BEARING TO BE HEATING UP AND STARTING TO FAIL. REPLACED INTEGRATED FLIGHT SYSTEMS AIR CONDITIONER COMPRESSOR AND PULLEY ASSY.