Meggitt S-TEC Fifty Five X, Pilot Operating Handbook

Page: 38 / 71

1st Ed. Jul 15, 06 3-9
S–TEC
The autopilot will laterally steer the aircraft along a predefined course
programmed into the Navigation Receiver. 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.
Note:
In the GPSS mode, the autopilot will expand the aircraft's turn rate limit to
130% of a standard rate turn.
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.
3.1.3.1 Pilot Selectable Intercept Angle
To select a course intercept angle, set the PFD Hdg Bug to the desired intercept
heading on the compass card, such that the difference between this heading
and the next course segment is the intercept angle. Press and hold the HDG
mode selector switch, and press the NAV mode selector switch twice to engage
the HDG mode and arm the GPSS mode. HDG, NAV, and GPSS annunciations
will appear as shown in Fig. 3-12.