Wikipedia says this was walked back, unfortunately. > Aviation authorities swiftly implemented new recommendations from the European Union Aviation Safety Agen

Wikipedia says this was walked back, unfortunately. > Aviation authorities swiftly implemented new recommendations from the European Union Aviation Safety Agency that required two authorised personnel in the cockpit at all times but, by 2017, Germanwings and other German airlines had dropped the rule. https://en.wikipedia.org/wiki/Germanwings_Flight_9525 https://en.wikipedia.org/wiki/Germanwings_Flight_9525