What was found
FLT#289, JFK-SAN. 'DURING ENG START FAINT ODOR OF DIRTY SOCKS NOTED ON FLT DECK AFTER START IT DISSIPATE. DURRING CLB ODOR IN COCKPIT AND FA'S REPORTED ENTIRE CABIN ODOR REOG + ISO GUIDANCE 4-53 FCOM 1. WAS RUN. AFTER PACK 1 WAS ISOLATED ODOR DISSIPATE IN COCKPIT AND CABIN. NOTES GIVEN WORK ON APU I AM NOT 100% IT WAS PACK 1 AND IT MAY HAVE BEEN COINCIDENTIAL ON ODOR DISSIPATING FROM APU + PACK 1 ISOLATION (NO TROUBLESHOOTING DONE WITH CUSTOMER ON BOARD).' (SUPPLEMENTAL INFORMATION TO FOLLOW)