Yes, and cockpit windows frozen from the inside when not wearing the oxygen mask.
And the possibility of a frozen oxygen valve.
The implemented use of oxygen at all, maybe?
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Win 7/64 Ult.; Phenom II X6 1100T; ASUS Crosshair IV; 16 GB DDR3/1600 Corsair; ASUS EAH6950/2GB; Logitech G940 & the usual suspects

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