What was found
DURING DESCENT AROUND 10000FT STRONG FUME ODOR UNABLE TO ISOLATE OR DETERMINE WHCH PACK IT WAS FROM -PERFORMED TSM 05-50-00-810-831-A TO ISOLATE SOURCE. FOUND PACK #2 TO BE THE SOURCE. PERFORMED DECONTAMINATION OF ECS IAW AMM 21-00-00 AND RAN BOTH ENG AT IDLE IAW AMM 71-00-00. DECONTAMINATION OF PACK #2 COULD NOT BE PERFORMED DUE TO NO PARTS ON HAND. REF LP 3346686-1 FOR PACK #2 MEL. DESCRIPTION OF ODOR/FUMES: TEMPORARY, MUSTY DRY SMELL. APPARENT CABIN SOURCE: CABIN AIR SUPPLY VENTS. FWD CABIN, MID CABIN, AND AFT CABIN. NO VISIBLE SMOKE/HAZE. NO MEDICAL ATTENTION REQUIRED.