As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX FLIGHT NR 2149, ON TAXI OUT FOR TAKEOFF, NR 1 AUTOFEATHER TEST FAILED TO TEST. MAINTENANCE CHECKED FOR 28 VOLTS AT NR 1 FEATHER VALVE, NO DEFECTS NOTED. REMOVED, CLEANED AND RESEATED CONNECTORS AT NR 1 ENGINE TSCU. COMPLIED WITH NR 1 AUTO FEATHER TEST IAW DHC-8 200 MM 71-00-00-868-027. OPERATIONAL CHECK GOOD. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.