FAA Ground School Practice Test

While on final approach, receiving an alternating green and red light followed by a flashing red light indicates that the pilot should:

1. Proceed with caution

2. Continue the approach

3. Exercise extreme caution and abandon the approach

4. Prepare for emergency landing

The correct answer is: Exercise extreme caution and abandon the approach

Receiving an alternating green and red light, followed by a flashing red light while on final approach signals that the pilot should exercise extreme caution and abandon the approach. This combination of light signals serves as an urgent warning, indicating that the runway is unsafe for landing. The alternating green and red signifies that there is a conflict on the runway, such as another aircraft, vehicle, or debris, while the flashing red light reinforces the need to take immediate action to avoid a potentially hazardous situation. This interpretation aligns with standard aviation procedures, ensuring the safety of both the aircraft and those on the runway. When faced with such signals, the pilot must prioritize safety, leading to the recommendation to abandon the approach and possibly circle back or divert to an alternate airport, depending on the circumstances.