Italian manufacturer Tecnam delivered the 400th P2006T twin to a customer last weekend.
Polish flight training organisation Bartolini Air took the keys to milestone aircraft at the Berlin Pilot Expo.
Tecnam CSO Walter Da Costa was the Rotax-powered twin had revolutionised the twin-engined GA market.
"Key to the success of the P2006T Twin has been our commitment to offer our customers unbeatable value, coupled with low operating and ownership costs, innovative design and Italian styling," Da Costa said.
"The Rotax engines, in particular, allow the Tecnam P2006T to be an environmental leader as well. With remarkable fuel savings and significantly lower noise emissions, it has redefined both the flight training and ownership experience in a single step."
Looking very much like a scaled-down Partenavia (the same person designed both airframes), the retractable, metal-bodied P2006T will cruise at 145 kt using, and has a stated fuel consumption of 34 lph.
Since the US Federal Aviation Administration first certified the P2006T under FAR Part 23 in 2010, the aircraft has established itself in the ranks of the new twins, regularly out-selling Piper's classic PA-44 Seminole and is the only real challenger to the Diamond DA42.
More than 2000 students from around the world have now been trained on the P2006T, with the world-wide fleet now passing 26,000 operating hours.
A P2006T airframe also formed the basis of NASA's X-57 Maxwell project, which was discontinued in June last year.