As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: STARTED TO SMELL ODOR LIKE OIL IN BLEED SYSTEM. LEFT PACK LIGHT ILLUMINED. RAN QRH. LIGHT WENT OFF WITH TRIP RESET. ABOUT A MINUTE LATER PACK LIGHT ILLUMINATED AGAIN. SHUT DOWN PACK IAW QRH. REMOVED AND REPLACED THE LEFT PACK TCV IAW AMM 21-51-10.