Flight Into Hell is based on the real-life recollections of German airplane pioneer pilot Hans Bertram (Helmut Zierl) and his mechanic, Adolph Klausman (Werner Stocker). who were lost in Timor sea for 53 terrifying days while attempting a round-the-world flight in 1932, The action fluctuates between the marooned Bertram and Klausman and the efforts by several different countries to rescue the downed airmen.

(Main Source: All Movie Guide)