What was found
DURING THE TAXI FOR TAKEOFF, THE RIGHT HAND PROPELLER OVERSPEED TEST, FAILED TO OPERATE WHEN SELECTED. THE AIRCRAFT RETURNED TO THE GATE. OUTSTATION MAINTENANCE INSPECTED AND CLEANED THE RIGHT HAND PROPELLER OVERSPEED GOVERNOR CANNON PLUG, IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 61-21-04. OPERATIONAL CHECKS WERE COMPLETED, AND THE AIRCRAFT WAS RETURNED TO SERVICE.