As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DECENT THE VARTOMS SYSTEM DISENGAGED. CAUSING THE NUMBER 1 ENGINE TORQUE TO DECREASE. THE PILOT WAS UNABLE TO GET THE TORQUES MATCHED MANUALLY. ABORTED THE LANDING AND PROCEEDED TO AN AIRPORT TO PERFORM A PRECAUTIONARY LANDING. AFTER EXTENSIVE TROUBLESHOOTING AND CONTACT WITH TECH SUPPORT, WE COULD NOT DUPLICATE THE ISSUE OR FIND ANY FAULTS WITH THE SYSTEM.