SigPig SigPig:
The Challenger first entered service in the early 1980's long before the Tutors were up for replacement in any capacity. Kind of a none issue really.
I still maintain that the Tutor is a viable aircraft in terms of safety simply because we have a whole mess of spares. Though in terms of appearances it does look a tad bad that our demonstration team is flying forty year aircraft. But unsafe they are not.
Nothing wrong with a 40 year old aircraft.