As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER STARTUP PILOT REPORTED THE OIL PRESSURE WAS READING LOW. MAINTENANCE CHECK OF THE OIL PRESSURE GAUGE SYSTEM WITH AN EXTERNAL CALIBRATED GAUGE SHOWED THAT THE OIL PRESSURE GAUGE WAS READING 15 PSI LOWER THAN THE CALIBRATED GAUGE WITH NORMAL OPERATING TEMPERATURES. A NEW OIL PRESSURE GAUGE KIT WAS INSTALLED AND CHECKED AND FOUND TO BE OPERATING NORMALLY. WE ARE UNABLE TO DETERMINE HOW MANY HRS ARE ON THIS GAUGE.