Garmin GI 275 Installation Manual page 250

5.7.2.3 Honeywell (Bendix/King) KFC 200 Autopilot
The autopilot interface must be configured for a King KFC 200. The following procedure may be used in
place of the KC 295 calibration instructions in Bendix/King KFC 200 IM/MM (P/N 006-05134-0002,
Rev 2) when using the GI 275 for gyro emulation. If all prerequisites are not met, or all steps are unable to
be completed, then this procedure is not authorized for use. The prerequisites are as follows:
• GI 275 is installed for gyro emulation
• Flight Director Type setting KI 256 is being used
• Maintenance test port is installed per Figure 5-27
• A calibrated voltmeter accurate to 1mV at a 5 VDC range
Complete the following procedure:
1. Power the GI 275 in Configuration mode.
2. Power on the KFC 200 system.
3. KC 290 mode controller adjustments:
a. Using the Gyro Output Test page (Calibration/Test → Autopilot → Gyro Output Test), verify
the internal AHRS Pitch/Roll Outputs are zero and valid (i.e., Attitude Valid button is
illuminated green).
b. Loosen the KC 290 mode controller from its mount to gain access to the pitch/roll adjustment
pots on the bottom of the mode controller.
c. Connect the voltmeter to pins 6 and 1 on the maintenance port.
d. Adjust the Pitch Adjust pot on the KC 290 until the voltmeter reads 0.0 ± 0.3 VDC.
e. Connect the voltmeter to pins 5 and 4 on the maintenance port.
f. Adjust the Roll Adjust pot on the KC 290 until the voltmeter reads 0.0 ± 0.3 VDC.
4. Roll gyro calibration:
a. Remove the dust cover on KC 295 to gain access to adjustment pots.
b. Verify the internal AHRS Roll Output is zero and valid.
c. Connect the voltmeter to pins 3 and 4 on the maintenance port.
d. Adjust the Gyro Roll Zero pot on the KC 295 computer until the voltmeter reads
0.0 ± 0.05 VDC.
e. Set the internal AHRS Roll Output to 25° RT using the right ROLL arrow.
f. Adjust the Gyro Roll Gain pot on the KC 295 computer until the voltmeter reads as close to
+5 VDC as possible.
g. Set the internal AHRS Roll Output to 25° LT using the left ROLL arrow.
h. Verify the voltmeter reads as close to -5 VDC as possible.
5. Pitch gyro calibration:
a. Connect the voltmeter to pins 2 and 1 on the maintenance port.
b. Verify that the internal AHRS Pitch Output is zero and valid.
c. Adjust the Gyro Pitch Zero pot on the KC 295 computer until the voltmeter reads
0.0 ± 0.15 VDC.
d. Set the internal AHRS Pitch Output to 10° UP using the up PITCH arrow.
e. Adjust the Gyro Pitch Gain pot on the KC 295 computer until the voltmeter reads as close to
6 VDC as possible.
190-02246-10
Rev. 11
GI 275 Part 23 AML STC Installation Manual
Page 5-72