As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING A TRAINING TOUCH-AND-GO MANEUVER, THE ENGINE ROLLED BACK IN POWER AND THE LOW OIL PRESSURE WARNING ANNUNCIATED. THE ENGINE WAS SHUT DOWN IN FLIGHT AND AN UNSCHEDULED LANDING CARRIED OUT. MFG WILL INVESTIGATE THE INCIDENT AND ADVISE OF ROOT CAUSE ONCE ESTABLISHED.