As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON REPOSITION LEG FROM SFO TO SNA CREW TURNED ON WING ANTI ICE FOR TESTING. AFTER A FEW MINUTES THEY NOTICED WHAT APPEARED TO BE SMOKE IN PAX CABIN. THEY TURNED OFF SYSTEM AND CONTINUED TO SNA. REMOVED CLOSE OUT PANELS AND DETERMINED TO BE SPILLED COFFEE ON BLEED AIR DUCT IN CABIN. CLEANED DUCT AND PERFORMED MAINTENANCE EVALUATION FLIGHT WITH NO FURTHER DEFECTS NOTED.