Flight Control Systems ✈️

Primary Flight Controls

• Ailerons: Primary surfaces for roll control.
  • Connected to the control wheels and autopilot via cables and PCUs (Power Control Units).
  • Hydraulically powered by systems A and B.
• Elevators: Change airplane pitch attitude, assisted by the stabilizer.
  • Controlled by control columns, autopilot, and mach trim system.
  • Hydraulically powered, with artificial control feel provided.
• Rudder: Controls yaw (movement around the vertical axis).
  • Inputs from rudder pedals, trim system, and yaw damper.
  • Hydraulically powered; additional standby system.

Secondary Flight Controls

• Spoilers and Speed Brake System
  • Flight Spoilers: Aid ailerons with roll control and slow the airplane after landing.
  • Ground Spoilers: Deploy with flight spoilers for additional slowing.
• High Lift Devices: Increase wing area and lift at low airspeeds.
  • Leading edge flaps, slats, and double slotted flaps.

Control Panels and Indicators

• Flight Control Panel: Located on the overhead panel.
  • Controls for aileron trim system are on the aisle stand.
  • Trim positions and indications are presented on control columns.
• Stabilizer Trim System: Controls for manual and autopilot adjustments.
  • Automatic speed trim system for stability at low speeds.

Roll Control

• Ailerons assisted by Flight Spoilers
  • Spoilers deploy if control wheel movement exceeds 10 degrees.
• Mechanisms for jammed ailerons or spoilers
  • Transfer mechanism allows roll control using non-jammed components.

Pitch Control

• Stabilizer and Elevators
  • Elevators controlled by control columns, autopilot, hydraulic systems.
  • Mach trim system for pitch adjustments at high speeds.
• Indicators and abnormal conditions
  • Master caution and enunciators for differential hydraulic pressure.

Yaw Control

• Rudder and Yaw Damper Systems
  • Rudder controlled by pedals, rudder trim system, and yaw damper.
  • Yaw damper prevents Dutch roll, aids turn coordination and gust damping.
• Abnormal conditions and emergency operations
  • Hydraulic alternatives and manual reversion mechanics.

Additional Systems and Failures

• Non-normal indications and pilot interventions
  • Systems for addressing dual and single system failures.
  • Standby systems for rudder and yaw damper in case of primary system loss.