As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - ON FLIGHT NUMBER 2212, ABORTED TAKEOFF DUE TO AUTOFEATHER ARM FAILURE PRIOR TO ROTATION. MAINTENANCE REMOVED AND REPLACD RELAYS 6121-K2 AND 6121-K5 AND NR 1 ENGINE TSCU. ALL AUTOFEATHER OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.