As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELECTRICAL ODOR MID CABIN ON DESCENT. PERFORMED VISUAL INSPECTION AND SMELLED FOR ELECTRICAL BURN ODOR IN PASSENGER CABIN, NO FAULTS OR ODOR NOTED. INVESTIGATED CIRCUMSTANCES AND ADJUSTMENT TO TEMPERATURE WAS DONE JUST BEFORE ODOR APPEARED. RAN AIR CONDITION SYSTEM USING APU NO ODORS NOTED. SYSTEM OPS CHECKED GOOD.