As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB, OIL SPLATTERED ON WINDSHIELD. PILOT RETURNED TO HIS DEPARTURE AIRPORT AND LANDED. UPON INVESTIGATION, IT WAS FOUND THAT THE PROP BETA SEAL WAS LEAKING DURING FULL POWER RUNS BUT NOT AT IDLE. PROPELLER WAS REMOVED AND REPLACED WITH A SERVICEABLE PROPELLER.