As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OIL ODOR FROM VENTS ON FLT DECK, WITH ENGINES AT REDUCED POWER. ODOR CAME FROM VENTS AFTER REDUCING THROUGH 50 PERCENT TORQUE FOR APPROACH. NO SMOKE WAS APPEARENT. COMPLIED WITH ENGINE RUNS AND BOROSCOPE INSPECTIONS, FINDING NO EVIDENCE OF OIL OR DISCREPANCIES. NO CONTAMINATION FOUND IN CABIN. COULD NOT DUPLICATE. RETURNED TO SERVICE.