Twilight takes a trip to Canterlot and is traveling back, what could go wrong?

Twilight decides to take a ride on the newly built Equestrian Airlines,
this being the fifth time that the new airplane has launched and successfully works, she has no fear.
The flight is taking her across Northern Equestria and there is a snow storm, unexpectedly the engine fails.

Causing the airplane to plunge into the vast cold.