As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON INITIAL TAKEOFF AFTER ESTABLISHING A POSITIVE RATE OF CLIMB, CROSS CHECKED THE INSTRUMENT PANEL AND HAD NO INDICATION OF ENGINE OIL TEMPERATURE OR PRESSURE. NOTIFIED TOWER MADE 180 DEGREE TURN AND RETURNED TO BASE AND LANDED. MAINTENANCE REMOVED AND REPLACED THE ENGINE OIL PRESSURE/TEMPERATURE GAUGE IAW MM. (K)