(Crash of China Eastern Airlines) The crew of the crashed passenger plane announced the search for another black box in the underground probe

　　China News Service, Wuzhou, March 23 (Chen Qiuxia and Jiang Xuelin) On the afternoon of March 23, the "3.21" China Eastern Airlines Flight Accident National Emergency Response Headquarters held the second press conference in Wuzhou, Guangxi.

The reporter learned from the press conference that a black box of China Eastern Airlines flight MU5735 was found on the 23rd.

Not sure if it is a data recorder (FDR) or a cockpit voice recorder (CVR).

　　The press conference informed that the entire technical force of the investigation team is currently searching for another black box. Professional equipment has been used in the afternoon to detect the area below the ground of the accident site. search in an all-out effort to find another black box.

　　Boeing 737-800 aircraft are equipped with two flight recorders produced by the American Honeywell Company, one of which is a data recorder (FDR), which is installed at the rear of the passenger cabin and starts recording when the engine is started, and stops when the engine is stopped. The recording time is 25 About an hour, the recorded parameters are detailed, about 1000, such as altitude, speed, heading, pitch angle, roll angle, vertical speed and the operation of the crew such as the steering wheel stick, throttle and other important parameters.

　　The other is the cockpit voice recorder (CVR), which is installed at the rear of the cargo bay and starts recording when the aircraft is powered on and stops when it is powered off.

Four channels of sound can be recorded, namely the captain's channel, the co-pilot channel, the backup channel, and the ambient sound channel, and the recording time is about two to three hours.

　　The outer surface of these two recorders is orange, the color is very eye-catching, easy to search and find, and can resist high overload shock (3400g, 6.5ms), high temperature (1100 degrees for 60 minutes of fire), and seawater immersion (30 It is not easy to be damaged and can help analyze the state of the aircraft, the operation of the crew and the conditions faced in the cockpit after an accident.

　　According to reports, when the plane crashed, the weather on the route was airworthy and there was no dangerous weather.

Regarding communication, according to the ground-to-air communication records between the crew and the air traffic control unit, the crew and the air traffic control unit maintained normal communication since the aircraft took off from Kunming until the sudden drop in altitude on the route.

　　Regarding the airworthiness of aircraft maintenance, this aircraft was introduced on June 22, 2015. Aircraft maintenance has been implemented in strict accordance with the maintenance technical plan, and the technical condition is stable and normal.

Before takeoff, the aircraft complied with maintenance release standards and airworthiness requirements and was released normally.

　　Regarding the flight crew, the flight crew of the flight consisted of 3 people, 1 captain and 2 co-pilots.

The captain was hired as the captain of the B737 model in January 2018, with a total flight experience of 6,709 hours.

The total flight time of the first co-pilot is 31,769 hours.

The total flight time of the second co-pilot is 556 hours.

The flight licenses and health certificates of the three pilots are all within the validity period, and they are in good health and complete flight experience, meeting the requirements of the Administration.

From what I have learned so far, the performance of several pilots is usually very good, and the family situation is relatively harmonious.

　　After the crash, China Eastern Airlines has grounded all 737-800 passenger planes.

The press conference stated that the grounding of the aircraft does not mean that the Boeing 737-800 will inevitably have potential safety hazards, but an emergency response after a major accident and a responsible behavior for passengers. The conclusion shall prevail.

At present, China Eastern Airlines has sufficient capacity, and flights will not be affected by the grounding of some aircraft.

China Eastern will carry out relevant work in an orderly manner in strict accordance with civil aviation safety management regulations.

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