Originally Posted by
Mr Rumbold
Doing some boredom-induced spying on flightaware...
XOJet nearly always has their Citation X at FL470.. but Mountain Aviation (“foothills”) rarely sends them up there... any known reason??
also, any X drivers who’ve achieved FL510?
One doesn't want to pay for the O2 that one pilot has to suck and the other does pay or tells their pilots not to suck it. More current people might explain the requirements for flight above 410, 450 whatever.