As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB, LEAVING AIRPORT, PILOT NOTICED RT ENGINE OIL PRESSURE FLUCTUATING AND PRESSURE DROPPED BELOW 40PSI. PILOT SHUTDOWN ENGINE AND RETURNED TO AIRPORT. DURING INVESTIGATION, MECHANICS FOUND OIL PRESSURE TRANSMITTER CONNECTOR CONTAMINATED WITH FLUID AT BACKSHELL AREA. CONNECTOR WAS REMOVED, CLEANED, RE-INSTALLED AND RE-PROTECTED. ENGINE RUNS WERE CARRIED OUT AND ACFT WAS RETURNED TO SERVICE.