The 3 Grinch that stole Xmas. Why were they flying upside down?

Nicholas Migliaccio writes: I think it was the pilot from Colorado brought in his kit. No it was really not marijuana related
 t was an auroral storm of the century, trashed their instruments, in the middle of a 12 hour white out left them flying blind, and  upside down, the wrong way into the West Flank of Mt.Elbert, where no one knew to look for them.   Their instruments must have been trashed by the storm as the black box showed them impacting the mountain, upside down, at 550 knots.  There was not much in the way of big pieces left.