re: Official Thread: Missing Malaysia Airlines Flight 370

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The transponder is a simple switch that could be accidentally turned off by a confused pilot slowly losing oxygen.

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It's a knob and you have to turn it to off.

and that would have been done way before ;ast contact with ground.

If one is suffering from Hypoxia so much that they turn the wrong knob on a vital piece of equipment, I doubt they would be alive 12 minutes later.


Top right is the two channel radio, two slots below it is the transponder.


bottom right of this image is the pressurization controls.

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As far as ACARS I am getting conflicting stories about how it's turned off. Some say you have to climb into a 'pit' below the deck while some suggested it can be turned off from the cockpit?

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I found this, but I am still looking for a cockpit image with the actual breaker shown.

"The only way to disable it is by pulling a circuit breaker in the cockpit. There are hundreds of circuit breakers in the cockpit of a 777 that correspond to every electrical device in the plane — from the coffee pot to the sockets on passenger seats. To find that particular circuit breaker one would have to be a 777 pilot or an expert trained in that particular model of aircraft."

Then there is this, flight management menu has a screen where ACARS can be disabled.

"The instructor, who has flown the Boeing 777 for eight years, said the ACARS was an independent system that cannot be switched off but it could be disabled through the ACARS manager page, which is part of the flight instrumentation."