I recently saw that V-22 left rotor position was wrong in model viewer (Free flight -> Aircraft -> Details...).
After some tests and look at sar2 code, I understood that moving parts as rotor, gears, ailerons, doors, and so on..., are not drawn in model viewer as in game.
In game, parts are drawn using rotor_new, landing_gear_new, aileron_left_new, rescue_door_new, and so on... parameters, but in model viewer, they are only drawn with translate and rotate parameters. It is why x, y, z and h, p, b rotor_new values are always 'copied and pasted' to translate and rotate values (example: hh60.3d file):
...
# Tail rotor
# blades x y z h p b r prop_wash? flw_con? blur?
rotor_new 2 0.3 -9.1 0.6 0.0 0.0 80.0 1.5 0 0 1
# r g b a
rotor_blur_color 0.15 0.15 0.15 0.75
begin_model rotor
#$model_flags
translate 0.300000 -9.100000 0.600000
rotate 0.000000 0.000000 80.000000
# Struts to blades
...
V-22 left rotor is an exception, it don't work in model viewer if translate 'z' value is copied from rotor_new 'z' value: value must be modified.

I don't know if it is possible that copying 'z' value works for V-22 left rotor, but if yes, it would certainly need to modify some primitives in addition to rotor_new values.