As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PILOT TRAINING, THE NR 2 ENGINE OIL PRESSURE FLUCTUATED THEN REMAINED BELOW MINIMUM ALLOWABLE LEVEL. THE ENGINE WAS SHUTDOWN IN FLIGHT AND A UNSCHEDULED LANDING WAS PERFORMED. THE ELECTRICAL CONNECTORS WERE CLEANED, OIL INDICATING SYS OPERATED NORMALLY & ACFT WAS RETURNED TO SERVICE.