What should a pilot do if they lose the tail rotor in flight?

If a pilot loses the tail rotor in flight, the most appropriate action is to perform an auto-rotation, particularly while maintaining a speed of 70 knots or more. This approach helps control the helicopter while reducing the risk of uncontrollable yaw due to the loss of the tail rotor's thrust.

In an autorotation, the pilot allows the helicopter to transition from powered flight to a descent where the main rotor is driven by the upward flow of air rather than engine power. Maintaining forward airspeed is crucial, as it helps to maintain control and stability during descent and allows for a safer landing. At 70 knots or higher, the helicopter has better aerodynamic efficiency, making it easier for the pilot to manage the situation and maintain directional control as the aircraft descends.

Performing an autorotation gives the pilot a chance to land safely, minimizing the potential for loss of control and maximizing the chances of a survivable outcome.