As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OIL PRESSURE WARNING/IFSD DURING FLIGHT, THE CREW REPORTED AN OIL PRESSURE WARNING AND ELECTED TO SHUTDOWN THE ENGINE. THE ACFT DIVERTED FROM THE INTENDED DESTINATION AND LANDED SAFELY. THE PROBLEM WAS TRACED BACK TO A FAULTY OIL PRESSURE SWITCH WHICH WILL BE REPLACED BEFORE THE ACFT IS RETURNED TO SERVICE.