What are the reasons for the abnormal flight?

Under normal circumstances, flights will take off or land on time, but due to mechanical failure or weather changes, aircraft can not take off and land normally, resulting in some flights being delayed or cancelled.

Generally speaking, the reasons for flight delay or cancellation include the following aspects:

(1) Weather reason: If there are severe meteorological conditions such as fog, sandstorm, low clouds, thunderstorm and strong wind at the airport where you take off or land, it is often lower than the minimum standards for taking off and landing of the airport, aircraft and aircrew, and the aircraft cannot take off and land. Sometimes, due to too much snow or ice on the airport runway, or weather such as thunderstorm or hail during the flight, the ground taxi or air flight of the aircraft will be affected. At this time, for the safety of passengers, airports often have to be closed and wait for the weather to improve, which will cause some flights to be delayed or cancelled, which will bring great inconvenience to passengers and irreparable losses to airlines.

(2) Reasons for flow control: The aircraft is a large aircraft with high-speed movement, and it must run along the specified route, the specified height layer and the vertical and horizontal intervals to ensure foolproof. The air traffic control department uses advanced radar monitoring and communication equipment to direct flights. When the flight flow of a certain route is too large, they will send information to the airport, leaving the ground flight waiting to take off, and the delay is inevitable.

(3) Mechanical reasons: After the plane has a serious fault, it can't be repaired in time and the fault can't be completely eliminated, so for the sake of safety, the flight has to be delayed or cancelled.

(4) Passenger reasons: Some passengers did not board the plane on time after checking in, but checked their luggage. In order to ensure the safety of the plane, they must take off their luggage before the flight, which will delay the time and delay the flight. In addition, some passengers have to catch the current plane because of temporary problems, which will also cause abnormal flights.

In addition, some work has not been done well, such as navigation control, communication and navigation, commercial stowage, safety inspection and meteorological support. No matter which link is not done in time, it will affect the normal take-off or landing of the flight.

After the flight is delayed or cancelled, passengers will naturally be disappointed, and some passengers will even make some excessive behaviors and have disputes with airlines. However, airlines have made every effort to resume normal flights as soon as possible, and airlines also hope that flights can be normal. The economic loss caused by the delay is great: the cost of grounding an aircraft for one day needs more than 200 thousand yuan; When the flight is delayed due to mechanical failure, capacity allocation and other reasons, it is also necessary to bear the cost of arranging passengers' accommodation. But in any case, as a special means of transportation, the requirements for safety should not be sloppy. In the contradiction between safety and punctuality, airlines can only choose safety.