Why did the plane have an accident in bad weather?

Usually in bad weather, low visibility, or at night, accidents are more likely, because at this time, flying can only rely on instruments.

If the device for measuring air pressure on the plane is broken or blocked, the height displayed by the instrument will be wrong!

At this time, the pilot may hear the altitude warning, but various instruments show that the plane is flying at high altitude. The pilot may judge that there is something wrong with the altitude warning, but in fact he is already flying at a very low altitude.

Then he may unconsciously lower the altitude, and then all the crew and passengers suddenly fall to the ground or hit the mountain without warning!

Discovery broadcast a plane crash very similar to the above, because

Before the plane was cleaned on the ground, the staff had to seal the entrance of the pressure sensor with tape, but after cleaning, he forgot to take the tape off! Finally the plane crashed into the sea.