As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
1) CREW NOTED MOMENTARY MULTIPLE CASCADING CAS MESSAGES FOLLOWED BY CLEARING OF MAJORITY OF MESSAGES WITH FADEC1 FAIL REMAINING IN FLIGHT 2) CREW ELECTED TO RETURN TO BASE. 3) MTN COLLECTED ALMF AND F40B FILES AND SENT TO PILATUS. 4) CAS MESSAGE TRIGGERED BY MOMENTARY LOSS OF DCPU #3 WHICH TRIGGERED L FADEC FAIL FAULT. 5) MTN R&R DCPU #3 WITH INSPECTED UNIT. OPS CHECK GOOD.