Under what circumstances can't the plane land!

Clouds, fog, precipitation, smoke, haze, sandstorm, floating dust and other phenomena will reduce visibility. When the horizontal and oblique visibility of the airport drops below the critical value, resulting in line-of-sight obstacles, it will be difficult for the aircraft to take off and land. When the horizontal visibility is less than 65,438+0,500 meters, the runway visual range should be observed at the airport with instrument landing facilities. In an airport with an instrument landing system, the plane can land in low visibility.

Aircraft failure, passengers' special circumstances and the weather outside the airport will also make the aircraft unable to fly.

The fuel quantity of the flight will generally reach the destination (plus some extra emergency fuel). If it is crash landing, most of the fuel will not be used up. Too much fuel will increase the weight, which will make the aircraft have more inertia when landing and taxiing, and finally make it impossible to stop at the end of the runway. At the same time, aircraft crash landing will also lead to aircraft fuel emissions. If the plane is on fire or needs direct friction contact with the ground (the wheels are not put down), too much fuel will lead to or aggravate the combustion.