As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ACFT WAS SNAGGED FOR LOW OIL PRESSURE DURING FLIGHT. THE ACFT OIL PRESSURE RELIEF POPPET VALVE WAS FOUND TO HAVE SOME SCORING ON THE FACE. ALSO THE OIL PRESSURE GAUGE WHICH HAD 33 HOURS SINCE NEW WAS FOUND TO BE READING 10 PSI LOW. WHEN THE GAUGE WAS REPLACED WITH A NEW KIT 10 DAYS EARLIER IT WAS FOUND TO BE READING WITHIN A POUND OF A MASTER CALIBRATED GAUGE.