What was found
FLT#8576, STI-FLL. 'DURING CLIMB WE EXPERIENCED A LEVEL 2 FUME EVENT AS PER FOM AND FCOM VOL 1. THE ODOR WAS AN OILY GREASY CHEMICAL SMELL .. WE PERFORMED THE ODOR ISOLATION PROCEDURE IN FCOM VOL1. STEP #9 DROVE US TO ISOLATE PACK 1 WHICH MADE THE SMELL GO AWAY. MCC AND DISPATCH CONCURRED VIA SATCOM THAT THE APU WAS MOST LIKELY THE SOURCE BECAUSE THE APU HAS A HISTORY OF LOW OIL LEVELS, AUTO SHUTDOWNS, AND APU GEN FAILS. THE LEVEL 2 EVENT WAS PERSISTENT UNTIL PACK 1 WAS TURNED OFF. IT WAS DETECTABLE BY MULTIPLE CREW MEMBERS. MILD TO MODERATE IRRITATION REPORTED BY MULTIPLE CREW MEMBERS, INCLUDING HEADACHES TINGLING NOSES, AND IITCHY EYES. SYMPTOMS SEEMED TO REDUCE ONCE THE PACKS WERE TURNED OFF; REF L/P 3799191, ITEM 2 (ACCOMPLISHED TASK 21-00-00-615-807-A, FOUND NO EVIDENCE OF ODOR IN CABIN. PACKS 1 & 2 FOUND TO BE NORMAL. OK TO CONTINUE SERVICE.). ACCOMPLISHED TASK 21-00-00-615-803-A PACK BURN. 1 7 32 PACKS OK TO CONTINUE SERVICE, MX-4 UPDATED, PLACARDS REMOVED MDDR# 518469 CLEARED.'