Functional application of black box

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.