DA42 Twin Star
Flight Crew Instrument; Flight Crew Private
Flight Crew Last 90 Days 9; Flight Crew Total 170; Flight Crew Type 5
Aircraft Equipment Problem Critical
Flight Crew Landed As Precaution; Flight Crew Returned To Departure Airport
Aircraft
During practice maneuvers; our Diamond DA42NG experienced a momentary loss of power from the right engine; coupled with an indication that one of the right engine's ECUs failed. Both pilots elected to return to [departure airport] immediately while troubleshooting the engine problems. The pilot flying noticed that the right engine would no longer return to idle; and would not re-synchronize with the left engine. We [advised ATC of the situation] a few miles from [the departure airport] because we did not know how the engines would react when we landed and reduced power. The landing was uneventful and both engines cooperated for the procedure.
The pilot of a DA42 reported a malfunctioning engine that resulted in a successful return to the departure airport.