As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED, CANNOT ROLL DOWN TO IDLE. FADEC DEGRADE AND RESTART FAULT ON CAUTION WARNING PANEL. FOLLOWED PROCEDURE AND CUT OFF FUEL. RESTART FAULT FLASHED 5 TIMES. RETURNED TO BASE, CHECKED PLA ANGLE WHEN IN HANGAR. FADEC FAILURE HAPPENED MULTIPLE TIMES WHEN CHECKING THE PLA ON THE TWIST GRIP AND COMPUTER.