Pilot Café Instrument Flight Rules (IFR) Practice Test 2025 - Free IFR Practice Questions and Study Guide

When the aircraft is not turning, the Turn Coordinator should indicate that the ball is centered and the wings are level. This is because the Turn Coordinator is designed to show both the aircraft's rate of turn and the coordination of the turn. When the aircraft is in straight and level flight, there is no lateral force acting on the aircraft, meaning that the turn indicator will reflect a centered ball, indicating there is no need for rudder input to maintain a coordinated flight. The wings will also be level, indicating that there is no bank angle applied.

In contrast, if the ball were outside of the turn, it would indicate that the aircraft is skidding, and if the ball were in the opposite direction of the turn, it would indicate that the aircraft is uncoordinated and potentially in a slip. Meanwhile, the indication of wings into the turn would imply that the aircraft is actively turning and not in level flight. Thus, the correct description of a non-turning aircraft is when the ball is centered and the wings are level.