As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW RECEIVED AN INDICATION THAT THE LEFT HAND PROP WAS ONLY PRODUCING 36 NP. THE FLIGHT THEN RETURNED TO EVV. OUTSTATION MAINTENANCE INSPECTED AND CLEANED THE FEATHER SOLENOID AND ENGINE CONTROL UNIT CONNECTOR AND CYCLED THE I-2 CIRCUIT BREAKER IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 73-00-00. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.