G1000/GFC 700 Post Installation Checkout Procedure – Hawker / Beechcraft King Air C90
Page 8-3
190-00682-00
Revision 5
3. Using
the
NOSE UP/DN
wheel on the MFD, decrease the climb speed by 10 KIAS. Also, set an
appropriate power setting to give the desired rate of climb.
In FLC mode, sufficient power must be available to hold commanded airspeed. If sufficient power
is not available, aircraft will hold the current altitude until sufficient power is available.
4. Prior to reaching the selected altitude the system will transition to ALT mode. The green “FLC”
and airspeed reference will extinguish and be replaced by a green “ALT” and reference altitude.
“ALT” will flash for 10 seconds to indicate the transition to the new mode and the reference
altitude will be displayed in green to the right of “ALT”.
5. Repeat steps 2-4 in a descent for a selected altitude at least 1,000 feet below the present altitude
and an increased reference airspeed by 10 KIAS.
While climbing or descending, the system will smoothly acquire the selected airspeed and maintain that
airspeed /- 3 knots with no oscillation. The system will capture the desired altitude and transition
to the ALT mode prior to the selected altitude with minimal overshoot.
8.6
Altitude Hold (ALT) Mode & Heading Select (HDG) Mode
1. Establish straight and level flight with the autopilot engaged in Altitude Hold (ALT) mode.
Synchronize the HDG bug to current aircraft heading and engage HDG mode.
2. Use
the
HDG
bug to change heading 90
°
. The autopilot will bank the airplane at standard rate, up
to a maximum bank angle of 25
°
±
2
°
. The airplane will roll out on the selected heading with
minimal overshoot. Altitude should remain within
±
50 ft of the altitude reference.
3. Repeat step 2 with a change of 90
°
in the other direction. Altitude should remain within
±
50 ft of
the altitude reference.
4. Allow the system to fly in ALT and HDG modes for 5 minutes. The aircraft’s altitude should
remain 50 ft. with no regular or cyclical oscillations.
8.7
Overspeed Protection Mode
1. Establish the airplane in straight and level flight at a safe altitude. Engage the autopilot in a
convenient lateral mode and VS mode.
2. Select a vertical speed reference and power setting to cause a descent that would exceed 226
KIAS. As the airspeed approaches 226 KIAS, the system is designed to enter overspeed
protection mode and maintain 226 KIAS with minimal overshoot. Overspeed mode is annunciated
by flashing “
MAXSPD
” in yellow and black. This annunciation is located above the airspeed tape.
3. Reduce power and decrease the vertical speed reference to a lower rate of descent to exit
Overspeed mode and return to VS mode.
8.8
NAV Modes
Follow the procedures below to verify the proper operation of the navigation modes. Note that the
Autopilot can track VHF NAV or GPS guidance. The navigation sensor currently displayed on the HSI
dictates the NAV source that will be tracked by the autopilot.
NOTE
