As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT CREW STATED PLASTIC-VINEGAR ODOR IN FLT DECK THAT GOT STRONGER AS THE FLT CONTINUED. ODOR BUILT UP IN AFT PART OF FLT DECK. CABIN CREW WERE SUMMONED TO FLT DECK TO CONFIRM ODOR AND THE CABIN CREW EYES WOULD WATER AND BE IRRITATED. NO ODOR OR PROBLEMS IN CABIN AREA. ONLY IN FLT DECK. CONFIRMED ODOR ON GROUND WITH PACKS ON. REPLACED BLOWER FAN & RECIRCULATION FILTERS.