As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TWO HOURS OF FLIGHT BOTH PILOTS SMELLED STRONG ELECTRICAL / BURNED OIL FUMES WHICH IRRITATED EYES. NO VISIBLE FUMES MAIN AIR VALVES SELECTED TO LOW PRESSURE FUMES DISAPPEARED. AIRCRAFT RUN UP SYSTEMS OPS CHECKED GOOD. DUCTS WORK INSPECTED (LOW PSI) NO DEFECTS. RT & LT ENG OIL SERVICING CHECKED, AGB OIL SERVICING NORMAL. NO DISCREPANCY FOUND. AIRCRAFT OK FOR SERVICE.