What was found
WHILE ADVANCING #1 THROTTLE FROM FLIGHT IDLE TO FULL OPEN #1 ENGINE OIL PRESSURE DROPPED TO ZERO. REPLACED WITH SERVICEABLE TRANSMITTER AND RETURNED TO SERVICE.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
WHILE ADVANCING #1 THROTTLE FROM FLIGHT IDLE TO FULL OPEN #1 ENGINE OIL PRESSURE DROPPED TO ZERO. REPLACED WITH SERVICEABLE TRANSMITTER AND RETURNED TO SERVICE.