What was found
ON TAKEOFF ROLL AUTOFEATHER FAILED TO ARM. ABORT INITIATED AT APPROXIMATELY 95 KIAS. ABORTED TAKE OFF. REMOVED FROM SERVICE. NO FAULTS FOUND IN CDS PER Q400 AMM 61-20-00-710-804. REMOVED AND REPLACED #2 PEC IAW Q400 AMM TASKS 61-20-36-000-801 AND 400-801. ALL FUNCTION. OPS AND CALIBRATION TESTS GOOD. NO FAULTS POSTED IN CDS. NO OTHER DEFECTS NOTED. AUTOFEATHER AND UPTRIM OPS TEST C/W 3 TIMES WITH ENGINES RUNNING IAW Q400 AMM TASK 61-20-00-710-810. OPS TEST GOOD 3 TIMES. AIRCRAFT RETURNED TO SERVICE.