Operators of the Centurion 2.0 rave about the fuel efficiency, while also railing against the engine’s maintenance issues, most notably the need to replace the gearbox clutch plate with an overhauled unit every 300 hours or less. The plan these days is for Continental and its network of U.S.-based service centers to oversee maintenance of the engine, something that was done in Germany. The gearboxes, according to reports we’ve heard, will still need to be overhauled in Germany, though schools can stock spare parts to cut the airplane’s downtime to a couple of days. Continental’s hope, Gregoire says, is for the TBO on the gearbox to eventually go up to 2,400 hours, an interval that will make the Thielert, unknown issues aside, a lot less expensive to operate than a Lycoming. Continental has already announced it is seeking to increase the first inspection interval to 600 hours from the current 300.