As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE FLIGHT CREW HAVE REPORTED 3 EVENTS OVER THREE WEEKS OF AUTO-FEATHER (AF) FAIL TO ARM INDICATIONS DURING TAKE-OFF AND HAVE REJECTED THE TAKE-OFFS AS A RESULT. AIRCRAFT OPERATED ON MINIMUM EQUIPMENT LIST (MEL) WITH RESTRICTIONS TO ALLOW RETURN TO MAIN MAINTENANCE BASE. THIS HAS BEEN AN INTERMITTENT DEFECT FOR SEVERAL WEEKS WITH RELAYS AND AF CONTROL BOX CHANGE. NEXT STEP IS TO CHANGE THE TSCU.