S-TEC Fifty Five X Pilot Operating Handbook page 38

S–TEC
The autopilot will laterally steer the aircraft along a predefined course
programmed into the Navigation Receiver, and limit its turn rate to either:
130% of a standard rate turn (Prog/Comp Hardware Mod Code AM and below)
90% of a standard rate turn (Prog/Comp Hardware Mod Code AN and AP)
110% of a standard rate turn (Prog/Comp Hardware Mod Code AR and above)
During the GPSS mode of operation, the autopilot will not accept any course
error input from the PFD CRS Pointer. A typical view of the PFD with the GPSS
mode engaged is shown in Fig. 3-11.
Fig. 3-11. PFD Display, GPSS Mode Engaged
If there are no programmed course segments in the Navigation Receiver upon
attempted engagement of the GPSS mode, the FAIL annunciation will appear,
NAV and GPSS annunciations will flash, and the autopilot will hold the aircraft's
wings level.
With the GPSS mode engaged, the autopilot is also capable of executing the
following procedures if programmed into the Navigation Receiver:
Procedure Turns, Approaches, Missed Approaches, Holding Patterns
However, the autopilot will not automatically fly vertical profiles (reference
section 3.5.2).
2nd Ed. Nov 15, 07 3-9
1st Rev. Mar 01, 08