As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RETURNED TO FIELD DUE TO EXTREME ODOR AFTER POWER REDUCTION FROM TOGA THRUST AT APPROX 1500 FT AGL. OXYGEN MASKS UTILIZED. CABIN DUMPED AND RETURNED. ALL CREW & PAX SMELLED ODOR. APU BLEED AIR SUPPLY SYSTEM . COMPLIED WITH INFO NOTICE T015A. FOUND APU OVERSERVICED. DRAINED SYSTEM TO CORRECT LEVEL. PERFORMED ECS DECONTAMINATION AND NO ODOR PRESENT WITH ENGINE BLEEDS.