What was found
FLT#703, JFK-SJU. 'HEAVY ODOR ON DESCEND THRU 12000 IN COCKPIT INFLIGHT CALLED AT 11,500 ABOUT HEAVY ODOR/FUME IN CABIN STAYED IN PLANE ALL WAY TO GATE; REACTIVATED PACK #2 REF AMM 21-51-00 OPS CHECK GOOD. REF LP #3437218 ITEM #1 FOR DECONTAMINATION. NO ODOR WAS NOTED AT THIS TIME. MDDR CLR, MX-4 UPDATED. PLACARD REMOVED. (SUPPLEMENTAL INFORMATION ADDED TO DESCRIPTION)