As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON TAKE OFF ROLL 40-50 KNOTS THE NR 1 PROPELLER GAUGE WENT TO ZERO ON BOTH DIGITAL AND ANALOG DISPLAYS. ALL OTHER ENGINE GAUGES NORMAL. MAINTENANCE CARRIED OUT AN INSPECTION AN FOUND TWO PINS (Z AND FF) IN CONNECTOR 9811-P13 (P/N MS3476L22-55PN) TO BE CORRODED AND TO BE AT FAULT WHEN MEGGARED. CONNECTOR REPLACED.