As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT THE OUTER MARKER ON APPROACH, THE PILOT NOTICED AN OIL ODOR IN THE ENVIRONMENTAL SYSTEM. THE AIRCRAFT LANDED WITHOUT INCIDENT. POST FLIGHT WALK AROUND REVEALED OIL LEAK AT THE RT PROPELLER. MAINTENANCE WAS DISPATCHED AND INVESTIGATION REVEALED THE RT PROPELLER DOME PISTON O-RING WAS CUT/ROLLED. THE O-RING WAS REPLACED AND THE AIRCRAFT WAS RETURNED TO SERVICE. (K)