As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APPROACH THE PILOT NOTICED OIL PRESSURE FAILURE ON PRESSURE INDICATING GAUGE, MX TROUBLESHOOTING OF SYS DECIDED THAT THE ABOVE MENTIONED PART WAS FAULTY. THE NEW PART WAS INSTALLED AND THE OIL PRESSURE INDICATION FAILED. INSTALLING A SECOND NEW OIL TRANSMITTER CURED THE PROBLEM.