As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GEG - AUTOFEATHER FAILED TO ARM ON TAKEOFF ROLL. ABORTED TAKEOFF. RETURNED TO GATE. PERFORMED OPERATIONAL TEST OF THE PROP AUTOFEATHER AND UPTRIM SYSTEM IAW Q400 AMM TASK 61-20-00-710-801. OPS CHECK GOOD. A/C OK FOR SERVICE. NO PARTS REPLACED.