As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
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. MAINTENANCE CLEANED AND INSPECTED THE RIGHT HAND PROPELLER OVERSPEED GOVERNOR CANNON PLUG. OPERATIONAL CHECKS WERE COMPLIED WITH IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 71-01-00.