To preclude use of the TRNG switch back to the flight position, the PFD Torque Display must be less than ________%.

• A. 30%
• B. 40%
• C. 50%
• D. 60%

Answer: (B)

The main idea is ensuring a safe margin before returning from training mode to flight mode. The PFD Torque Display shows how much rotor torque is being used as a percent of the maximum available torque. To prevent an abrupt or unsafe change when you switch the TRNG selector back to flight, the system requires torque demand to be low enough. The published limit is 40%, so only when the PFD Torque Display is under 40% is it considered safe to return to flight mode. If the torque readout were higher, switching could lead to unexpected rotor response or control issues, so the switch should remain in training until torque drops below that threshold. The other values would either be too restrictive or too permissive for safe transition.