1997 China southern airlines air crash detailed report, what are the details? What about blind drop?

1997 China southern airlines air crash

No.3456/KLOC-0 takes off from Chongqing Jiangbei Airport at 9: 45 and is expected to arrive at Shenzhen Huangtian Airport at 2130.

2 1:07 establish contact with the approach control of Shenzhen airport and approach runway 33 according to normal procedures;

2 1: 17 establish contact with the tower. The tower told the crew that "it rains heavily on five sides and calls when you see the runway";

2 1: 18:07 The crew reported that "ILP has been established";

2 1: 18:53 The crew reported "seeing the entrance light", and the tower commanded the aircraft to "check the landing". Near the plane approaching the platform, the tower saw the landing light of the plane, but the light was not clear in the rain. The ground radar shows that the flight path and descent altitude of the aircraft are normal.

The plane landed at the southern end of the runway for the first time. After grounding, the plane jumped three times and then went around. Turn left after going around and rise to 1200m. The tower reminded the crew to turn on the transponder, but it was not displayed on the secondary radar.

2 1:23:40, the crew once again asked other aircraft to avoid, reported "emergency" and various warnings (hydraulic system, landing gear, flaps, etc. ) appears in the cockpit. The tower informed other planes that they had been allowed to avoid;

2 1:23:57, the crew reported that it was in a trilateral position and asked other aircraft to avoid it;

2 1:24:58 The crew requested to use fire engines and ambulances after landing, and the tower informed the crew that everything was ready. Then the plane made another turn and reported that it was going to land south. The tower agreed to land to the south, and told the 2925 troops that "the troops that landed in front reflected that the weather was fine in the north and it rained heavily on five sides in the south". The unit answered clearly and said, "I'm going to land."

The landing time is 2 1:28:30. After landing, the plane disintegrated and caught fire.

Instrument Landing System (ILS), also translated as Instrument Landing System and Blind Landing System, is the most widely used aircraft precision approach and landing guidance system. Its function is to guide the course and glide slope through two radio signals emitted from the ground, and to establish a virtual path from the runway to the air. The aircraft can determine its relative position with this path through the airborne receiving equipment, so that the aircraft can fly to the runway in the right direction and descend smoothly, and finally achieve a safe landing. Because the instrument landing system can guide the aircraft to land in the low weather standard or the weather where the pilot can't see any visual reference, it is called blind landing.

Blind descent is the common name of ILS. Because the instrument landing system can guide the aircraft to land in the low weather standard or the weather where the pilot can't see any visual reference, people call the instrument landing system blind landing, that is, the pilot can control the flight landing when the airport runway can't be seen clearly with the naked eye.