As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI, THE CREW ATTEMPTED A PROP OVERSPEED TEST. THE TEST FAILED, AND THE AIRCRAFT RETURNED TO THE GATE . PIT MAINTENANCE INSPECTED AND RESET THE OVERSPEED CIRCUT BREAKER. OPERATION CHECKS WERE COMPLIED WITH IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 71-01-00, AND THE AIRCRAFT WAS RETURNED TO SERVICE.