As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 3236 - LYH-DCA - WHILE PERFORMING AUTOFEATHER TEST ON PREFLIGHT CHECK, THE NR 1 TORQUE INDICATOR DOES NOT INCREASE WHEN 'TEST' SWITCH IS SELECTED. CLEANED THE 7700-P3 CONNECTOR AND REMOVED AND REPLACED THE 6121-K3 RELAY AS A PRECAUTION.