As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE LEFT PROPELLER MOVED TO THE FEATHER POSITION WHEN POWER LEVERS WERE ADVANCED TO FLIGHT IDLE. THE AIRCRAFT RETURNED TO THE GATE. OUTSTATION MAINTENANCE CLEANED THE LT ENGINE SENSOR HARNESS CONNECTORS IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 73-21-00, 73-21-01 AND 61-23-01. OPERATIONAL CHECKS WERE COMPLETED, AND THE AIRCRAFT WAS RETURNED TO SERVICE.