15 recommendations to improve safety following the crash of the Ju 52 Swiss Transportation Safety Investigation Board STSB, Aviation Division Payerne, 28.01.2021 - The Swiss Transportation Safety Investigation Board (STSB) has published the final report on the crash of the Ju 52 aeroplane near Flims (canton of Grisons, Switzerland) on 4 August 2018. In its report, the STSB concludes that a number of different factors led to the accident. To improve aviation safety, the STSB has issued eight safety recommendations to the supervisory authority and seven points of safety advice to the companies concerned. The investigation does not establish blame or determine liability. On 4 August 2018, a historic Junkers Ju 52 commercial aircraft known as ‘Iron Annie’, operated by Ju-Air, crashed near Flims in Switzerland. All 20 people on board lost their lives. The STSB investigated the accident in order to identify the cause of the crash.