What was found
FLT#2825, JFK-TPA. 'MODERATE DIRTY SOCK ODOR COMING FROM THE AIR VENTS WAS DETECTED AT 3,000' DURING VECTORS TO APPROACH, UNABLE TO RUN THE ODOR RECOGNITION & ISOLATION CHECKLIST DUE TO PHASE OF FLIGHT, ODOR LASTED FOR 5 MINUTES AND DISSIPATED ON APPROACH. INFLIGHT CREW DID NOT SMELL THE ODOR AND NO CUSTOMERS MENTIONED IT; ACCOMPLISHED FIM 21-22-00-00AAA-423A THROUGH STEP 2, NO DEFECTS NOTED, ODOR DISSIPATED WITH NO CREW ACTION, AIRCRAFT OK FOR SERVICE. NOTE: RAN BOTH ENGINES AND APU, ISOLATED BLEED AND PACKS ONE AT A TIME, NO ODOR NOTED.'