The Aims or Satco sim?
I concur with your NAA, the engine should start. I've had a few -67D starts go poorly. All the hot starts I've witnessed there was increasing N1, unfortunately ITT was increasing much faster than normal due to a weakening battery or tailwind. The engine would eventually have reached a sulf-sustaining N1, but had the start not been aborted limitations would have been exceeded and permanent damage may have been done. With the perfect tailwind I even had a T-handle illuminate once, but the start was just within limitations.
Hung starts I've had also. Cold day, weak battery, N1 accelerates to about 35% after ignition then stagnates, ITT about 500, starter still engaged, and little to no progress. The 20 sec. limitation on the starter doesnt apply after light off so you can just watch and wait. If N1 is increasing at all the engine will eventually spool up rapidly above 45% or so. If after about a minute of stagnation there isn't any progress the start is probably hopeless.
Your current model of a hot + hung start is a very bad day indeed. In nearly 4000 hours on the airplane I never ran into such a circumstance. The only scenario I could imagine would be an extremely weak batt, so weak that 12% N1 couldn't be attained, then a ham fisted pilot introduces fuel at something like 8% and just leaves it there. That might? produce such extreme temps and stagnant N1. (Now the true arctic warrior would modulate the condition lever to moderate ITT while nursing N1 higher, but that's a discussion for another day.)