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

• A. 95% torque
• B. CSYNC
• C. 83% torque
• D. OEI

Answer: (C)

When the AFCS is coupled to the Flight Director in forward flight at speeds above 80 KIAS, the system imposes a reduced torque limit of 83%. This constraint protects the engine and drivetrain from over-torque that could occur with automatic flight commands while still allowing the FD to steer and stabilize the aircraft effectively. The reduced limit provides a safety margin against gusts and rapid control inputs that the autopilot might demand, ensuring reliable and safe handling under coupled control.

Other options aren’t applicable here: a higher limit like 95% would increase the risk of over-torque under automatic commands; OEI refers to engine-out conditions rather than a normal torque limit; CSYNC is not a torque value.