What was found
THE RIGHT HAND PROPELLER FAILED TO COME OUT OF THE FEATHER POSITION, WHEN SELECTED. DURING THE ATTEMPT TO GET THE PROPELLER OUT OF FEATHER, THE RIGHT ENGINE WAS OVER TORQUED. THE AIRCRAFT RETURNED TO THE GATE. MAINTENANCE INSPECTED AND COMPLIED WITH A OVER TORQUE INSPECTION OF THE RIGHT HAND ENGINE, IN ACCORDANCE WITH DORNIER MANTENANCE MANUAL 05-57-01. MAINTENANCE INSPECTED AND REPLACED THE RIGHT HAND PROPELLER CONTROL UNIT, IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 61-21-06. OPERATIONAL CHECKS WERE COMPLETED, AND THE AIRCRAFT WAS RETURNED TO SERVICE.