As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW SMELLED BURNING ELECTRICAL OR BURNING RUBBER COMING OUT OF THE AIR CONDITION VENTS IN THE AFT PASSENGER COMPARTMENT. BURNING SMELL DISSIPATED WHEN AIR CONDITIONING TURNED OFF. BURNING SMELL POSSIBLY COMING FROM THE AFT BLOWER MOTOR. BURNING SMELL IN CP. AFT BLOWER MOTOR REMOVED , CLEANED, INSPECTED REINSTALLED. CND. PERFORMED 10 MINUTE GROUND RUN UP. NO DEFECTES NOTED