As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: PILOT REPORTS ODOR IN COCKPIT AFTER STARTING #2 ENG. PERSISTED THRU 120, NEXT LEG, SAME ODOR PERSISTED THRU FL160 ODOR IN CABIN MUCH LESS THAN IN COCKPIT. MAINTENANCE FOUND APU AIR INLET AND APU COMPARTMENT CONTAMINATED WITH OIL, FOUND OIL COMING OUT OF THE CENTER DRAIN TUBE WHICH INDICATES POSSIBLE FAILURE OF THE LOAD COMPRESSOR SEAL. MAINTENANCE REMOVED AND REPLACED APU OIL COOLER FAN ASSEMBLY IAW AMM 49-52-51, OPERATIONAL CHECK GOOD.