What was found
DIRTY SOCKS SMELL ON DECENT ONLY IN COCKPIT. SMELL GONE IF PACK 1 TURNED OFF. DESCRIPTION OF ODOR/FUMES: PERSISTENT, DIRTY SOCKS/ACRID/PUNGENT/IRRITATING/BURNING EYE SMELL. APPARENT CABIN SOURCE: UNKNOWN. FLIGHT DECK. NO VISIBLE SMOKE/HAZE. NO MEDICAL ATTENTION REQUIRED.-REF TSM 5-50-00. APU VERIFIED NO LEAKS, PER CONDITIONED AC WITH APU & ENG 1&2. NO SMELL. ISOLATED PACK 1&2. NO SMELL NOTED. AC OK FOR SVC IAW AMM 21-61-00, 49-00-00 & 72-00-00.