Multiple choice In a precision approach path indicator, four white lights signify that the airplane is way above the glide slope that the airplane is on the glide slope that the airplane is below the glide slope nothing Reveal answer Fill a bubble to check yourself A Correct answer Explanation In a Precision Approach Path Indicator (PAPI) system, four white lights indicate the aircraft is significantly above the glide slope. The pilot needs to descend to intercept the correct approach path for landing.