Page 45
Sub-section - 4.05
ABNORMAL PROCEDURES
FAA Approved
Original Issue: Feb 28, 2006
Hawker 850XP Pro Line 21 Airplane Flight Manual
AVIONICS SYSTEMS
(continued)
Single Audio System Failure
Audio switch (affected side) ....................................... EMERG
Audio volume control is provided through the other crewmember’s audio panel.
Dual Audio System Failure
No in flight action.
Only Comm 1 audio is available through the headset. The boom microphone must be used as
the hand microphone will be inoperative. Aural warnings will be inoperative.
CAT II Malfunctions
Discontinue the CAT II approach when any of the following occur:
• Any comparator illuminates.
• GS, LOC, ATT, FD or HDG flag appears on the PFD.
• Mistrim annunciator.
• Autopilot malfunction/disengagement below 1000 ft Radio Altitude.
• Amber or red CAT II annunciation.
Autopilot Mistrim Annunciation
Illumination of an amber boxed E (Elevator) or A (Aileron) annunciation on the PFDs indicate that
the autopilot is flying the airplane in a mistrimmed condition. If the mistrim indication continues
for more than a few seconds:
NOTE: Intentional or automatic stick-free disengagement of the autopilot into an
annunciated amber elevator mistrim indication will produce a significant airplane
response in the direction of the mistrim force.
If a continuous mistrim indication is presented, the pilot should brace the flight
controls and disconnect the autopilot. Upon disconnect, the pilot will experience
a force of between 15 and 20 pounds.
Re-engagement of the autopilot should not be attempted until the reason for the
out of trim state has been isolated and corrected, and the airplane has been
returned to a trimmed condition.
Flight controls ............................................................ Hold firmly
AP.............................................................................. Disengage
Retrim airplane if necessary
Fuel balance.............................................................. Check and balance as required
AP.............................................................................. As required
Continued Next Page
For Training Purposes Only
