As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#2201, JFK-FLL. ' FUME EVENT DURING DESCENT PHASE DESCENDING THROUGH 5000 FOR 3000 SIGNIFICANT DIRTY SOCK SMELL IN COCKPIT AND CABIN MORE EXTREME IN AFT CABIN CA & F3 HAVE HEADACHES; ACCOMPLISHED INFO NOTICE 2017-T015J REPLACED LH & RH RECIRC FILTERS. PERFORMED ECS DECONTAMINATION. REFER TO L/P 3651454, ITEM1 FOR MORE INFO. NO ODOR DETECTED WITH PACK 2.'