As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GNDED. AFTER DESCENT & LEVEL AT 6000 FEET, AN OIL SMELL WAS NOTICED IN THE COCKPIT. THIS WAS AGAIN NOTICED WHILE TAXING WITH RT ENG E SHUTDOWN & APU RUNNING. MX ACCOMPLISHED MCM CARD 21-91-01 & FOUND LT PACK TURBINE EXCESSIVELY OVER SERVICED. SERVICED TURBINE TO CORRECT LEVEL IAW AMM 21-51-01.