As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STRONG OILY ODOR FROM PACK RETURNED JUST BEFORE LANDING. IN COCKPIT AND CABIN. PERFORM FIM TASK 21-00-00-810-806 FOR FUMES IN CABIN. FOUND ''A'' HYD SYS RESERVOIR OVER SERVICED. SERVICED ''A'' HYD RESERVOIR TO CORRECT LEVEL PER AMM 12-12-00-610-811. PERFORM NR 1 AND NR 2 ENG RUNS IAW 71-00-00-700-819-F00. ISOLATE BOTH PACKS WITH SEPARATE ENGINE RUNS. NO ODORS OR SMELLS NOTED. AC OK TO CONTINUE.