As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT CREW CLAIMS TO HAVE SMELLED A LIGHT ODOR IN CABIN AREA WHEN TURNING ON APU BLEED FOR AIR COND, IN COCKPIT AREA AND GALLEY AREAS FLIGHT CREW EXPOUNDED THAT ODOR WAS NOT THAT OF BURNING OR OF SMOKE, BUT A DIFFERENT KIND OF ODOR. RAN APU WITH APU BLEED OPEN AND RAN BOTH PACKS REF AMM 49-00-00-710-008-A. NO NOTICEABLE ODOR DETECTED. NO PRIOR HISTORY IN LAST 30 DAYS.