What was found
FA REPORTED SMELLY MUSTY DIRTY SOCK SMELL IN CABIN PASSING 12000 FT ON DECENT THERE WAS A SLIGHT SMELL IN COCKPIT. FOLLOWED EQR PROCEDURE STARTING WITH PACK 2. SMELL STAYED SWITCHED PACK 2 BACK ON AND PACK ONE OFF SMELL WENT AWAY-PERFORMED TSM 05-50-00-810-831A ISOLATED ODOR TO PACK 1 SLIGHT ODOR PERFORMED ECS DECONTAMINATION OF PACK 1 IAW AMM 21-00-00 R&R RECIRC FILTER IAW AMM 21-21-41 NO ODOR PRESENT AT THIS TIME