Automatic Flight Control Systems (AFCS)

Question 0

AFCS Computer

Answer 0

It generates commands to the flight control actuators and the flight director by Processing data from:

• 2 Air Data Computers (ADC)
• 2 Altitude and Heading Reference Systems (AHRS)
• 2 Symbol Generator Units (SGU)
• the Radio Altimeter
• the GPS

Question 1

AFCS (Description)

Answer 1

AFCS achieves:
-Autopilot and or yaw damper function
-Flight Director function 
-Altitude Alert
It's components include:
-1 computer
-1 control panel
-1 Advisory display unit (ADU)
-3 servo-actuators (1 for each axis)

Question 2

Autopilot Manual Disconnect

Answer 2

• AP pb on AFCS control panel
• YD pb on AFCS control panel (Yaw Damper only)
• AP Quick Disconnect Pb
• Normal pitch trim Rocker
• GA pb on the Power Levers
• STBY Pitch Trim Switch
• Force on the Rudder Pedals in excess of 66lbs
• Force on the Control Column in excess of 22lbs

Question 3

Autopilot Auto Disconnect

Answer 3

• 1 of the engagement conditions of the AP or YD is no longer met
• Stall Warning occurs
• Disagreement between the 2 AHRS or the 2 ADC
• A mismatch between the 2 pitch trims

Question 4

Autopilot Minimum Engagement Altitude

Answer 4

For Takeoff
-100' (500' as per 121.579)
For other than TO or APP
-1000' (500' as per 121.579)
For VS or IAS mode during APP or for CAT1 APP Mode
-160' (50' as per 121.579)

Question 5

Autopilot NAV Mode for VOR Approach

Answer 5

Use of AP or FD is authorized only if:

• A Co-Located DME is available, and
• DME HOLD is not selected