What was found
UNUSUAL ODOR EMANATING FROM AIR DUCTS WHEN BLEED AIR SYSTEM TURNED ON. RETURNED TO AIRPORT FOR INVESTIGATION, MAINTENANCE RECONNECTED MAIN HEATER DUCT IN BELLY (BELLY HAD CARGO SPILL RESIDUE IN AREA).
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
UNUSUAL ODOR EMANATING FROM AIR DUCTS WHEN BLEED AIR SYSTEM TURNED ON. RETURNED TO AIRPORT FOR INVESTIGATION, MAINTENANCE RECONNECTED MAIN HEATER DUCT IN BELLY (BELLY HAD CARGO SPILL RESIDUE IN AREA).