As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STRONG OIL SMELL NOT ELECTICAL SMELL IN CABIN. RAN ENGINE TO PWR, WITH ONE BLEED AND ONE PACK AT A TIME. BURN OIL SMELL IS STRONGER WITH LEFT ENGINE BLEED. FOUND OIL IN EXTENSION SHAFT (NR 1 ENG). CLEANED OIL AND PERFORMED A PACK BURN AND INSTALLED BLIND CAP SEAL AND NR 5 BEARING COMPARTMENT COVER.