As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON LANDING, A FAINT ODOR OF OIL FROM PACKS. SWITCHED TO APU AFTER SHUTTING OFF BOTH PACKS. NO ODOR ON APU BLEED. PERFORMED ZERO CARBON SEAL LEAK CHECK AND ENGINE OPS CHECKS IAW MM 72-00-00-790-002. ALL OPS AND LEAK CHECKS WERE GOOD. PERFORMED ETN-EM-72-034 FOR ENGINE ODOR EVENT TROUBLESHOOTING. NO DEFECTS NOTED.