Air Crash Investigation – Pilot Betrayed 3/3

On 27 December 1991, Scandinavian Airlines Flight 751, a McDonnell Douglas MD-81 crash-lands in Gottröra when both of the engines fail within 2 seconds. Incredibly, all onboard survive. Clear ice had been sucked into both, causing internal damage. A system known as Automatic Thrust Restoration (ATR) then increased output after the engines had been throttled back to idle in an attempt to save them. The ATR system’s existence was not something the pilots were informed about.