What was found
FLT 1151, TPA-SJU. STRONG FUMES DURING DESCENT CABIN NOTICED STRONG FUMES IN AFT AND FRONT OF CABIN ( PACKS - SINGLE (SPEEDBRAKES OK) (N503-N665) ); PERFORMED OPERATIONAL CHECKS OF PACK 2 WITH ALL BLEED AIR SOURCES, REF AMM 71-00-00-810-801A. OPERATION IS NORMAL WITH NO ABNORMAL ODOR IN CABIN.THIS CLEARS MDDR 376624, MX4 UPDATED, PLAC RMVD MCC NOTIFIED. AFTER PERFORMING PACK 1 OPERATIONAL CHECKS, DETERMINED PACK 1 OPERATION PRODUCED THE MUSTY SMELL AS DESCRIBED ON LP #2336610. REF AMM 71-00-00-810-801A ( PACKS - SINGLE (SPEEDBRAKES OK) (N503-N665) ). TEM DEFERRED MEL 21-52-01A CAT C MCC NOTIFIED, MX4 UPDATED,PLAC INSTALLED. SUPPLEMENTAL INFORMATION TO FOLLOW.SUPPLEMENTAL INFORMATION: FT # 1151, TPA-SJU. STRONG FUMES DURING DESCENT CABIN NOTICED STRONG FUMES IN AFT AND FRONT OF CABIN ( PACKS - SINGLE (SPEEDBRAKES OK) (N503-N665) ); PERFORMED OPERATIONAL CHECKS OF PACK 2 WITH ALL BLEED AIR SOURCES, REF AMM 71-00-00-810-801A. OPERATION IS NORMAL WITH NO ABNORMAL ODOR IN CABIN.THIS CLEARS MDDR 376624, MX4 UPDATED, PLAC RMVD MCC NOTIFIED.