6. Pilot Betrayed (Scandinavian Airlines Flight 751)

On 27 December 1991, Scandinavian Airlines Flight 751 crash-lands without loss of life in Gottröra moments after taking off due to both engines failing. Clear ice from the tops of the wings had been sucked into both engines, causing internal damage. An automatic system (of which the pilots were unaware) to increase the engines' thrust contributed to their failure.