In 1991 the FAA published a list of
requirements for Level A, B, C and D simulators.
The following extract on aerodynamic modeling implies the Level D simulator must replicate the airframe real-life performance through the full range of ALT and MACH values.
AC 120-40B . Appendix 1 . 7/29/91 FAA
Level D Requirements (in part)
w. Aerodynamic modeling which, for airplanes issued an original type certificate after June 1980, includes low-altitude level flight ground effect, Mach effect at high altitude, effects of airframe icing, normal and reverse dynamic thrust effect on control surfaces, aeroelastic representations, and representations of non-linearities due to sideslip based on airplane flight test data provided by the manufacturer.
COMMENTS
Statement of Compliance. Tests required. See appendix 2, par. 4, for further information on ground effect. Mach effect, aeroelastic representations, and non-linearities due to sideslip are normally included in the simulator aerodynamic model, but the Statement of Compliance must address each of them. Separate tests for thrust effects and a Statement of Compliance and demonstration of icing effects are required.