Who knows where I can find the recording of the last ten minutes of Hainan Airlines air crash?

"Black box" comes from the common name of flight recorder and is one of the special electronic recording equipment for aircraft. Black boxes are divided into cockpit recorder and flight data recorder. The former can record the conversation of the pilot from takeoff to landing.

The recording tape is fireproof, waterproof and shockproof. The latter can record all kinds of data during the flight. The flight recorder is installed in a black metal box which is resistant to high temperature, high pressure, water and corrosion. The black box of modern aircraft has been painted orange or yellow, but it is still called black box.

The shell of the black box has a thick steel plate and many layers of heat insulation, impact resistance and compression protection materials, which are usually installed in the safest place at the tail of the aircraft. The recording medium has also been improved from magnetic tape to static storage recorder, which can withstand greater impact, similar to the memory chip in a computer to prevent the black box from being damaged in an air crash.

Extended data:

According to the use of black boxes, they are vividly called "judges", "instructors" and "doctors". The so-called judgment is based on the purpose of flight accident investigation. After the accident, by retrieving the black box and decoding the analysis data, we can determine the real cause of the accident and avoid similar accidents from happening again.

The so-called instructor refers to the function of pilot monitoring, which corrects the bad driving habits of pilots and prevents accidents by analyzing the data of black boxes daily; The so-called doctor is the role in aircraft fault diagnosis and maintenance. Through the daily analysis of the black box data, he can monitor and predict the health status of the main components of the aircraft, check hidden dangers, and prevent faults from developing into accidents.

In order to obtain objective and comprehensive information in accident investigation, the types and quantities of data recorded by black boxes are increasing. The data type is extended from the initial flight and audio data to video and data link data; The number of parameters has gradually developed from the initial five to hundreds or even thousands.

Flight data generally includes aircraft and engine operating state, pilot control, aircraft external information and so on. Audio data generally includes the dialogue between the pilot and the co-pilot, the dialogue between the plane and the ground, and the dialogue between the crew and the ambient sound in the cockpit. Video data generally includes cockpit instrument display, pilot action, aircraft front view, landing gear retraction state, etc.

Through the special data playback software, the flight process of the aircraft can be reproduced intuitively and truly with black box data, and the possible hidden dangers and abnormal operation of the aircraft can be automatically analyzed to prevent faults or accidents, which greatly improves the safety level of aviation flight.

References:

Baidu Encyclopedia-Black Box (Aircraft or Vehicle Electronic Equipment)