As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT ENGINE OIL PRESSURE GAGE NOTED TO HAVE DROPPED AND STUCK AT 12 PSI, OIL PRESSURE ON TAXI FOR TAKEOFF. AC WAS RETURNED TO MAINTENANCE AND A SERVICEABLE OIL PRESSURE INDICATOR WAS INSTALLED. OIL PRESSURE INDICATED NORMAL ON RUNUP/FUNCTIONAL CHECK.