An Air India passenger plane crashed during landing on Kozhikode Airport in Kerala on Friday evening. The investigation of the case is going on and it is believed that black box will be very helpful in this. The box has been found from the crashed plane and further action is being taken. What is this box that will reveal the secrets of the accident?
What is the black box?
Black boxes are used to detect accidents with the flight. It actually records all the movements of the aeroplane during its flight. The black box is also called Flight Data Recorder (FDR) as it records all the data. It is made of the strongest metal titanium for safekeeping. Also, the inner walls are made in such a way that the black box is safe even after an accident and give information about the accident.
Why the Black box was needed?
Attempts to make the black box began in the early 1950s. With the increase in the frequency of the planes, accidents also started increasing. Back then, there was no way to understand the cause of the accident or whose mistake caused the accident. Without knowing the reason for the accident it was not possible to stop repeating the same mistake which led to more accidents.
When it was invented?
It was finally invented in 1954 by aeronautical researcher David Warren. Back then, this box was called Red Egg because of its red colour. But later, this box was called a black box due to the blackness of the inner wall. However, it is not yet clear why this box is called a black box despite its upper part being of red or pink colour. The upper part is coloured red or pink because these colours are easily visible, even if the plane crashes in bushes or soil and dust, this box could be found.
How does it work?
It is safe due to being made of titanium and being in multiple layers. Even if there is a fire in the plane, the possibility of its end is almost nil because it can bear a temperature of 10000-degree centigrade for about 1 hour. Even after this, for the next 2 hours, this box can tolerate a temperature of about 260 degrees. One of its features is that it works without electricity for almost a month, that is, even if it takes time to find the crashed ship, the data remains saved in the box.
Emits sound waves
If there is an accident, there will be continuous sound coming out of the black box, which can be identified from far away by the search parties and thus the accident site can be reached. Even after falling down to 20,000 feet in the sea, the sound and waves come out of this box and they continue for 30 consecutive days.
Soon after the discovery, the black box began to be placed on every plane. It is kept at the back of each plane so that even if the plane crashes, the black box remains safe. It is kept at the back because usually, the back part of the plane is the least affected in an air crash.
Voice Recorder also helps
Not only the black box but another thing that helps in extracting data about the aeroplane is the CVR. The cockpit voice recorder is actually a part of the black box. It records the sounds of the last two hours on the plane. It records all the sounds in the cockpit. The conversation between the pilot and the co-pilot, the sound of the engine, the sound of an emergency alarm etc. This has been recovered from the accident site in Kerala too.