What was found
REAR FA NOTICED A LIGHT ODOR DURING DESCENT, UNDER 10,000 FT. THE ODOR WAS MUCH STRONGER ON GROUND AFTER LANDING. ONLY IN REAR OF AIRCRAFT AND WAS A POSSIBLE A SMOKE, BURNING ODOR. APPLIED TSM 05-50-00-810-831-A. FOUND APU SOURCE OF CABIN ODOR. PERFORMED A PACK DECONTAMINATION IAWAMM 21-00-00-615-002-A. NO FURTHER ODORS NOTED.