PRIMUSr 1000 Integrated Avionics System
A28--1146--112--00
Flight Guidance System (FGS)
6-2
D AP Disengage -- Normally, the autopilot is disengaged by pushing
the AP disconnect button located on the outboard side of each
control wheel. The autopilot can also be disengaged by any one of
the following:
- Pushing the AP or YD button on the GC
- Operating the pilot’s or copilot’s manual elevator trim switch or
backup elevator trim.
D CPLButton--TheCPLbuttonis usedto couplethe leftor rightside
HSIdata,andthatside’sflightdirectorcomputationstotheautopilot.
The system powers up coupled to the left side.
NOTES: 1. Iftheselectednavigationsourceisnotthesameon
both PFDs, and the FD NAV mode is selected, the
command bar on the uncoupled side is removed.
2. Under some conditions, particularly when the FD
NAV mode is selected, the command bars oneach
side may not show the capture of a navigation
course at the same time. This causes a split in the
right and left command bars.
Whenthesystemistransferredto thecross--side HSI,all flightdirector
modes are cancelled. Operating modes must be reselected. The
pointerontherightorleftsideoftheCPLbuttonlightstoindicatewhich
HSI are selected. A couple arrow is also displayed on both PFDs.
NOTE: The arm or capture status of the flight director modesare
only annunciated on the PFD.
D YD Button -- The YD button is used to select only yaw damper.
D YD Disengage -- The yaw damper can be disengaged by any one
of the following:
- Pushing the YD button on the GC
- Pushing the AP disconnect button on the outboard side of each
of the control wheels.
NOTE: The autopilot and yaw damper are automatically
disengaged when either aircraft stall protection system
detects an actual or stick shaker stall condition.
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