Article at BBC News
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German investigators have revealed that the pilots of the Russian airliner involved in last week's mid-air collision with a cargo plane received contradictory instructions seconds before the crash.
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According to German authorities, cockpit warning systems told the Tu-154 to climb and the cargo jet to descend, just 45 seconds before the collision.
But voice recorders reveal that one second later, Zurich air traffic controllers told the Russian pilots to descend.
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I have also read that most computer systems in the Swiss AT Tower were down due to maintenance. Also instead of the minimum 2 controls that must be present, only one was present. The phone lines were down too, so German AT Controllers (with a reputation at being the best in the world) were not able to warn the Swiss of the oncoming catastrophe.
I think this is a rare situation where the blame rests entirely on one party.
Tragically and ironically, the Russian pilots Collision Avoidance system instructed them to rise, whereas the Swiss controllers instructed them to sink.
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