As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BURNING SMELL COMING FROM INSIDE PAX DOOR. STRONG ENOUGH TO BE SMELLED IN THE COCKPIT. SUSPECT BURNING SMELL IN PASSENGER DOOR WAS LOWER AFT STEP LIGHT HAVING BURNT OUT. BULB WAS REPLACED. RAN APU AND ENGINES WITH NO SMELL IN COCKPIT OR CABIN. POWER WAS ON AIRCRAFT FOR SEVERAL HOURS WHILE WORKING OTHER SQUAWKS WITH NO SMELL IN COCKPIT OR CABIN. SUFFICIENT INVESTIGATION WAS GIVEN AND NO DISCREPANCY AT THIS TIME.