I am watching “Why Planes Collide.” Because of this episode I’m watching, I had to track down this question.
Not sure of the year, 90’s to mid 2000’s, there was a Soviet passenger plane, carrying a bunch of kids on a field trip, and and a German cargo plane, in the same airspace. This air space was controlled by a Swiss company named Sky Guide. There were supposed to be two air traffic controllers manning the Swiss company’s air space, but one had left to take a break, which left only one controller to man two computer screens “several feet apart.” This was against aviation rules, but one that was tacitly permitted by that Swiss company’s management.
The passenger plane and the cargo plane were at the same altitude, heading for a collision. A ground-based computer generated program on the German side, recently invented, called TCAS, automatically kicked in, told the pilot of the Soviet plane to ascend and told the pilot of the German plane to descend.
Then the one lone human air controller finally realized the planes were in deep trouble, and not knowing of the “commands” of the computer, gave the opposite order to the Soviet plane, to descend, instead.
The Soviets taught their pilots that human commands superseded computer commands, so the Soviet pilots hesitated for a second, before following their training, and followed the air controller’s command.
The planes collided and everybody died. Except not the air traffic controller.
The End.
PS. Wait. Breaking news. I paused the program before it was finished. Apparently the air traffic controller was treated for PTSD.
Then husband and father of 3 of the victims, his wife and two daughter, tracked the air controller down a year later and stabbed him to death.