As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUMES IN COCKPIT AFTER A GROUND RIGHT ENGINE START. FUMES CAME FROM LEFT PACK. MAINTENANCE TROUBLESHOT IAW FIM. FOUND RESERVOIRS OVER SERVICED. RAN BOTH PACKS, SMOKE RETURNED AND HYDRAULIC LEVELS DROPPED. REPLACED LEFT AIR PRESSURE FILTER ASSEMBLY. PERFORMED DUCT BURN OUT. REPLACED BOTH RECIRCULATION FILTERS. AIRCRAFT RETURNED TO SERVICE.