As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(NR 4 CARBON SEAL, PN30745732, SN 010515810208), (NR 5 CARBON SEAL, PN 30745742, SN 0119368002352) PILOTS REPORT HIGH OIL PRESSURE. OIL PRESSURE FOLLOWED THROTTLE HIGH GEARBOX PRESSURE CAUSED BY DETERIORATION OF NR 4 AND NR 5 CARBON SEALS.