As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FWD AND AFT CABIN AIR QUALITY IS POOR. EXTREMELY FOUL ODOR FROM PACKS AFTER LIFTOFF. AS PART OF TROUBLESHOOTING, CHECKED BOTH INLETS AND HEAT EXCHANGERS, GND AIR CONNECTION AND PACK AREAS. BOTH ENG'S RAN AT POWER 1HR., BOROSCOPED NR 1 ENGINE, FOUND NO EVIDENCE OF OIL LEAKAGE. SOURCE OF ODOR COULD NOT BE ESTABLISHED.