As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) UPON ENGINE SHUTDOWN THE CREW NOTED OIL STREAKING DOWN THE BLADES FROM THE PROPELLER, MORE THAN NORMAL. THE PROPELLER WAS REMOVED AND SENT FOR REPAIR AND THE SHOP REPLACED THE PISTON AND SEALS DUE TO SCORING INSIDE FROM MFG. THE PROP WAS REINSTALLED AND FUNCTION CHECKED SERVICEABLE.