During forward flight above 80 KIAS, what torque value is used as the torque limit when AFCS is coupled to the FD system?

• A. 83% torque
• B. 95% torque
• C. 70% torque
• D. 60% torque

Answer: (A)

When AFCS is coupled to the flight director, the system imposes a specific torque limit to protect the powertrain while still providing enough authority to follow FD commands. For forward flight above 80 KIAS, the preset limit is 83% torque. This value strikes a balance: it gives the AFCS enough torque reserve to accurately track the flight director’s guidance and handle gusts or maneuver commands, without pushing the engine/drive system toward its maximum or risking overstress. Higher limits would reduce the margin for protection, while lower limits could hinder the AFCS from achieving the commanded flight path.