As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT NOTED NO TRANSMISSION OIL PRESSURE INDICATION ON THE TRANSMISSION OIL PRESSURE GAUGE. THE CAWS PANEL TRANSMISSION WARNING LIGHT WAS NOT ILLUMINATED INDICATING THAT THERE WAS INDEED TRANSMISSION OIL PRESSURE. DURING TROUBLESHOOTING TRANSMISSION PRESSURE WAS FOUND TO BE NORMAL AND THEN THE TRANSDUCER WAS REPLACED. THE MALFUNCTION WAS FOUND TO BE THE INDICATOR. PN 90090006-01 S/N 0550.