When I fly in free flight the three aircrafts from acceleration are not
missing anything. The only problem I have for missing panels is in the
"missing coworker" mission where none if the intruments are shown. That
happens because I have the standard version of fsx and acceleration added.
It may be the same problem for you if you have standard intead of deluxe, but
affecting your game in a different way because of the hardware on your
computer. You could try uninstalling and re-installing acceleration again by
going to "add or remove programs" or "uninstall a program" (depending on you
operating system) in "control panel". Then just install using the disc
provided again. Hope this helps.