Gpss Approach (Lateral Guidance Only); Flight Director (Fd) Operation; Ap Mode; Pfd Display, Hdg And Alt Hold Ap Modes Engaged - S-TEC Fifty Five X Pilot Operating Handbook

S–TEC

3.3.7 GPSS Approach (Lateral Guidance Only)

Press the NAV mode selector switch twice to engage the GPSS mode (reference
section 3.1.3). The autopilot will laterally steer the aircraft along a predefined
approach, which has been programmed into the Navigation Receiver. To control
the assigned altitudes and rates of descent, use the Altitude Pre-Select
Function (reference section 3.1.6). For 400/500 Series equipped aircraft, to
make any procedure turns, engage the heading mode and use the PFD Hdg
Bug (reference section 3.1.1). Upon completion, re-engage the GPSS mode.

3.4 Flight Director (FD) Operation

The FD is a display of the flight profile. It is commanded by the autopilot.
A pair of Steering Command Bars and an Aircraft Reference Symbol (ARS),
superimposed upon a pitch ladder, comprise the FD. The FD operates in the AP
mode or the FD mode. Although the ARS is always yellow, the color of the
Steering Command Bars is different for each mode of operation.

3.4.1 AP Mode

Press the Remote AP ON Switch, and engage a roll and pitch AP mode. In this
case, the Steering Command Bars are magenta. The autopilot steers the
aircraft toward the Steering Command Bars until the ARS is tucked into them.
The FD provides a visual indication of how accurately the autopilot is tracking the
roll and pitch commands. A typical view of the PFD while in AP mode is shown in
Fig. 3-46.
Fig. 3-46. PFD Display, HDG and ALT HOLD AP Modes Engaged
3-32 2nd Ed. Nov 15, 07