As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING ENGINE RUN FOLLOWING MAINTENANCE THE LEFT PROP STARTED LEAKING OIL. LT PROP NR 1 BLADE SEAL WAS REPLACED AND ENGINE RE RUN WITH NO FURTHER EVIDENCE OF LEAKAGE. THE INNER SPRING OF THE FAILED BLADE SEAL HAD BROKEN AT THE WELD.