What was found
BURNING ODOR CAME FROM CABIN FLOOR IN SEAT 19AB AREA. INSPECTED SEAT 19AB IMMEDIATELY AFTER LANDING AND NO SMELL WAS NOTED. INSPECTED THE FOLLOWING: BALLAST FOR LOWER SIDEWALL LIGHTING EMERGENCY BATTERY PACK IN CEILING PHONES, PSU PANELS AND O2 GENERATOR. RAN ENGINES AND PRESSURIZED AIRCRAFT WITH WARM PACKS. INSPECTED WHEEL WELL AREA AND CARGO COMPARTMENTS. ALL THE ITEMS INSPECTED WERE OK. THE ONLY SMELL NOTED WAS IN THE AFT CARGO COMPARTMENT BEFORE THE BAGS WERE REMOVED AND THERE WAS A STRONG AMMONIA SMELL. ALSO INSPECTED THE RECIRCULATION FAN FOR OPERATION. AIRCRAFT OK FOR SERVICE.