Prepared expert report on the subject of diminution of value of a small transport category aircraft. Analysis involved the impact of improper engine maintenance on the value of the aircraft. Detailed analysis of the aircraft and its available record showed that the engine change did not result in any value loss of the aircraft.   Analysis showed that the aircraft had suffered damages not disclosed in the marketing material and had an incomplete and poor record that would indicate a diminution of the aircraft value not related to the engine change.