Investigations into the accident were carried out by the General Flugsicherheit der Bundeswehr and the
Bundesstelle für Flugunfalluntersuchung (BFU). The data from these devices were published in the BFU's interim report in September. The BFU's final report into the accident was published in August 2015. It stated that the causes of the accident were: • Immediate Causes: • During positioning for the interception, the collision risk due to unexpected manoeuvres of the intercepted airplane was not sufficiently taken into consideration. • The Learjet crew did not take into account the risks due to possible limitations of the field of vision and the distraction of using the computer when deciding their task distribution. Due to insufficient situational awareness during the intervention, the Learjet crew continued the turn with an excessive bank angle despite the loss of visual contact with the Eurofighter flying at the inside of the turn. • Systemic Causes: • The operator had not specified in detail how the crew should distribute their tasks during Renegade exercises. • Neither the operator commissioned to conduct the aerial target demonstration nor the Air Force had sufficiently described the Renegade training nor had a commensurate risk analysis been done. ==References==