Bryks' air force career continued while a democratic coalition ruled the Third Czechoslovak Republic. But in February 1948, the Communist Party of Czechoslovakia (KSČ) seized power in a coup d'état. Bryks was deemed "politically unreliable" and on 9 March was placed on enforced leave and transferred to the military reserve force. His political opinions resulted in his superior officer, Colonel Václav Fuksa, writing that Bryks was "untrustworthy for his political irresponsibility and for the lack of understanding of the ideology of People's Democracy".