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Page 32
Section - 3
EMERGENCY PROCEDURES
FAA Approved
Original Issue: Feb 28, 2006
Hawker 850XP Pro Line 21 Airplane Flight Manual
FLIGHT DISPLAY FAILURE FLAGS
The following failure flags are available for display on the PFD. The flags will appear flashing red
for 5 seconds and then remain illuminated.
In the following steps, # is 1 when referencing the pilot’s side and 2 when referencing the copilot’s
side.
ALT
This annunciation indicates invalid altitude data from the selected ADC. The altitude tape and
digital thousands readout are removed.
Relevant ADC reversion switch .................................Select operative ADC
AOA
This annunciation indicates invalid data from the angle of attack system. The Reference
Approach Speed (RAS) and Impending Stall Speed (ISS) cues will be removed and replaced
with the default low speed cue. The stick shaker, stick pusher, AOA indicator and AOA indexer
lights may be inoperative.
No in-flight action required.
NOTE: With the stick shaker and stick pusher inoperative, normal stall protection is not
available. Continue flight with caution.
AP
This annunciation indicates a disengagement of the autopilot. The Yaw Damper may also
disengage.
Automatic Disengagement
AP & YD Disengage button .......................................Push
Determine cause of disengagement
AP & YD ....................................................................As required
ATT
This annunciation indicates failure of the attitude data from the selected AHRS. The attitude
display is removed.
Relevant AHRS reversion switch ...............................Select operative AHRS
DCP
This annunciation indicates failure of the respective display control panel. Display format,
selected navigation and bearing sources remain unaffected, but control of the respective
displays is lost.
No in-flight action required.
FD
This annunciation indicates that the respective flight director has failed. If coupled to the failed
flight director, the autopilot will also disengage. If only one PFD is affected, flight director and
autopilot functions may be regained by transferring control to the operative side.
Continued Next Page
For Training Purposes Only