AFCS GMC707

Question 1

ALTS: Selected Altitude Capture Mode is automatically armed with activation of the following modes

Answer 1

• Pitch Hold
• Vertical Speed
• Flight Level Change
• Takeoff/Go Around (if the Selected Altitude is at least 400 feet above the current aircraft altitude)
• Vertical Path Tracking

Question 2

When can NOSE UP/DN Wheel be used

Answer 2

NOSE UP/DN Wheel can be used to change the vertical mode
reference while operating under Pitch Hold, Vertical Speed, or Flight Level Change Mode.

Question 3

ALT SEL Knob is used to?

Answer 3

ALT SEL Knob is used to set the Selected Altitude (shown above the Altimeter) until Selected Altitude Capture Mode becomes active. As the aircraft nears the Selected Altitude, the flight director automatically transitions to Selected Altitude Capture Mode with Altitude Hold Mode armed

Question 4

How do you know when the flight director automatically transitions to Selected Altitude Capture Mode

Answer 4

green ‘ALTS’ annunciation flashing for up to 10 seconds and the appearance of the white ‘ALT’ annunciation. The selected Altitude is shown as the Altitude Reference beside the ‘ALTS’ annunciation

Question 5

At what altitude does the flight director automatically transitions from Selected Altitude Capture to altitude Hold Mode

Answer 5

At 50 feet from the Selected Altitude, the flight director automatically transitions from Selected Altitude Capture to altitude Hold Mode and holds the Selected Altitude (shown as the Altitude Reference)

Question 6

What happens when you use of the ALT SEL Knob to change the Selected Altitude while Selected Altitude
Capture Mode is active

Answer 6

causes the flight director to revert to Pitch Hold Mode with selected Altitude Capture Mode armed for the new Selected Altitude.

Question 7

How do you activate altitude hold mode and what happens to the flight director?

Answer 7

Altitude Hold Mode can be activated by pressing the ALT Key; the flight director maintains the current aircraft altitude (to the nearest 10 feet) as the Altitude Reference. The flight director’s Altitude Reference, shown in the AFCS Status Box, is independent of the Selected Altitude, displayed above the Altimeter.

Question 8

What happens when the flight director is in Selected Altitude
Capture Mode

Answer 8

Altitude Hold Mode is automatically armed when the flight director is in Selected Altitude Capture Mode. Selected Altitude Capture Mode automatically transitions to Altitude Hold Mode when the altitude error is less than 50 feet. In this case, the Selected Altitude becomes the flight director’s Altitude Reference.