As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CRUISING VMC AT 9,500 FEET NEAR LFK, ENGINE SHOOK AND OIL PRESSURE BEGAN TO LOWER. CAPTAIN ELECTED PRECAUTIONARY SHUTDOWN OF ENGINE AND LANDED AT LFK WITHOUT INCIDENT. CARGO WAS DISPATCHED ON ANOTHER AIRCRAFT. SUSPECT PROBLEM AS VALVE FAILURE DAMAGING PISTON. AS YET UNCONFIRMED.