Multiple choice A red light flashed to an aircraft in flight means that the aircraft should not land for the time being that the aircraft is cleared to land that the aircraft should land on the taxiway that landing is allowed under emergency conditions Reveal answer Fill a bubble to check yourself A Correct answer Explanation A red light signal from ATC to an aircraft in flight means the aircraft should not land at that time. This could be due to runway obstruction, traffic congestion, weather, or other safety concerns requiring the pilot to go around or divert.