The responsibility of the Bundeswehr Technical and Airworthiness Center for Aircraft is to ensure that only safe, effective and efficient weapon systems are introduced into service with the German Armed Forces and to evaluate if the systems tested fulfil the requirements expected. The centre also carries out trials on and evaluations of weapon systems which are not planned to become part of the German Armed Forces inventory. Notably, this happened after the German reunification in 1990, when a large variety of former East German aircraft from the National People's Army became available.