Why do planes almost land and then go back up?

A go-around is not an emergency, and may be necessary for a number of reasons. Some of those include; unstable approach, unable to land in the touchdown zone, not in correct configuration, directed by ATC, obstacle on the runway (aircraft, vehicle, animal), or aircraft controllability issues.



When a plane descends near the runway and then suddenly climbs back up, it is performing a safety maneuver known as a "Go-Around." This is not an emergency, but rather a routine procedure initiated when the pilot or Air Traffic Control determines that a safe landing is not guaranteed. The most common reasons include unstabilized approaches (the plane is too high or too fast), sudden shifts in wind direction (wind shear), or an obstruction on the runway, such as another aircraft that hasn't cleared the area quickly enough. Pilots are trained to "think go-around" as the default option if everything isn't perfect. When the maneuver is triggered, the engines are set to "TOGA" (Takeoff/Go-Around) power, the landing gear is retracted, and the plane enters a holding pattern or "missed approach" path to try again. While it can be startling for passengers due to the sudden roar of the engines and the steep climb, a go-around is the ultimate proof that the flight crew is prioritizing safety over the convenience of landing on the first attempt.

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