As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) OIL PRESSURE DURING FLIGHT WAS FOUND TO BE LOW JUST ABOVE MINIMUM AT FULL POWER. WITH CALIBRATED TEST GAUGE FOUND OIL PRESSURE SENDER, GAUGE ON ACFT TO BE READING 10 PSI LOWER THAN MASTER GAUGE. NEW KIT INSTALLED AND ENGINE RUNS COMPLETED WITH NO FURTHER FAULTS.