What was found
FLT 775, JFK-MSY. CLIMBING THROUGH 6,000 FT, BOTH PILOTS DETECTED DIRTY SOCK, MUSTY, OIL ODOR IN THE FLIGHT DECK. IMMEDIATELY PERFORMED ODOR RECOGNITION AND ISOLATION ECL. PERSISTANT ODOR STOPPED AFTER USING THE PROCEDURE, ACFT HAS FUME HISTORY WITHIN 30 DAYS. LAST EVENT WAS ON 12-9-2025. COMPLIED AMP BD500-A-J21-22-00 , NO LEAKS FROM ENGINES OR APU COMPARTMENT, PACKS 1 & 2 DECONTAMINATION HAS BEEN ACCOMPLISHED, NO ODOR DETECTED IN COCKPIT OR CABIN , A/C OK FOR SERVICE.