As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#1851, JFK-CUN. ON DESCENT FA CALLED TO REPORT A DIRTY SOCK SMELL IN THE CABIN, PILOTS DID NOT NOTICE AN ODOR IN THE COCKPIT. BLEED WAS ON THE ENGINE APU OFF CABIN ODOR ISOLATED PROCEDURE COMPLIED WITH. PACK 2 ODOR PER TSI COMPLIED WITH INFORMATION NOTICE 2017-T015 SECTION B. DECONTAMINATION LEVEL A WAS ACCOMPLISHED PER TSM 05-50-00-810-831-A. PACK 2 REACTIVATED IAW 21-51-00. A/C IS OK FOR SERVICE.