About China Airlines flight 676:

At 15: 27 p.m. local time on February 16th, 1998, an Airbus A300B4-622R twin-engine wide-body passenger plane (registration number B-1814, delivered to China Airlines on December 14th, 1990, with a total flight duration of 20,193 hours at Denpasar International Airport in Bali, Indonesia. It belongs to a middle-aged plane, which is making preparations before taking off. The plane will fly from Denpasar International Airport in Bali to Taipei Chiang Kai-shek International Airport (now Taoyuan International Airport in Taipei) on flight CI676. There were 2 crew members, 12 crew members and 182 passengers on board (most of the passengers were from Taiwan Province province who returned from their trip to Bali, Indonesia, but there were also 5 Americans, 1 Frenchman and 1 Indonesian on board. Among the passengers were Xu Yuandong and his wife, then president of the "Central Bank" of China.

On the day of flying, the captain of flight CI676 was Kang Longlin, who was 49 years old. In 1990, he joined China Airlines after retiring from the rank of Air Force Fighter Force in Taiwan Province Province, China Province. His seniority was 8 years, with a total flight duration of 7,226 hours, of which 2,382 hours were obtained by flying A300 aircraft. The co-pilot was 44-year-old Jiang Desheng. In 1996, he joined China Airlines after retiring from the rank of Air Force Fighter Force in Taiwan Province Province, China. He had two years' experience and the total flight time was 3,550 hours, but he only flew 304 hours on the A300.There is a newly married flight attendant in the crew of flight CI676 who narrowly escaped the devastating Nagoya crash of China Airlines flight CI140 four years ago due to a shift change with a colleague

At 15: 26 pm local time, flight CI676 took off from Denpasar International Airport smoothly. If all goes well, it will arrive at Taipei Zhongzheng International Airport in four and a half hours. In the evening, at 19: 58 Beijing time, flight CI676 arrived in Taipei airspace, 10 nautical miles (about 11.5 miles, 18.52 kilometers) away from Chiang Kai-shek International Airport, that is, about 6 minutes left. Soon after, the crew began to get in touch with the tower of Chiang Kai-shek International Airport to prepare for the approach. At this time, the pilot was Kang Longlin, and the co-pilot Jiang Desheng was responsible for contacting the tower.

Jiang Desheng: "Tower, Dynasty 676 requesting approach." Zhongzheng Tower: "676, cleared for approach, 9 miles from the airport, wind speed 6 knots." Jiang Desheng: "Dynasty 676, prepare to land." Kang Longlin: "Flaps 15." Jiang Desheng: "Speed check, flap 15 confirmed." Zhongzheng Tower: "Dynasty 676, permission to establish an approach on the 5L runway." Jiang Desheng: "5L runway approach, Dynasty 676 understands." Zhongzheng Tower: "Dynasty 676, 5L runway wind direction 360, wind speed 5 knots, field pressure 1015 kPa." Jiang Desheng: "Dynasty 676 received." Kang Longlin: "Six miles from the airport." Jiang Desheng: "The height is a bit high, but it should be no problem." Kang Longlin: "Yes, it's a little high, but no problem. Keep approaching." Jiang Desheng: "Yes." Kang Longlin: "The visibility is relatively low, isn't it?" Jiang Desheng: "That's right." Kang Longlin: "Turn off the autopilot." Jiang Desheng: "Autopilot is off." Kang Longlin: "Now (visibility) is clear." Jiang Desheng: "Understood, execute the pre-landing checklist. The height is still high-"Kang Longlin:" Yes, 2 times 3 equals 6,2000, and 2 times 6 equals 12, which is fine, but not here. Ok, the flap is set at 20. " Jiang Desheng: "Flap 20, confirm. The landing gear is normal and the spoiler is in position. " Kang Longlin: "The wind speed is too strong, tell the tower!" " Seeing that Jiang Desheng was a little slow, he immediately forced another sentence: "Quick! Come on! Talk to the tower! " Jiang Desheng: "Tower, Dynasty 676 is 3 miles from the airport. Please confirm the wind speed and runway condition." Zhongzheng Tower: "Dynasty 676, runway clearance, wind speed 6 knots, you can land." Jiang Desheng: "The glide path is all blue, and the glide path is all green." Kang Longlin: "The glide slope is 1,000 feet high, which is a bit high. Come on, let's give it a try."Kang Longlin: "Landing gear down." Jiang Desheng: "The landing gear is down, and the three lights are all green." Kang Longlin: "Turn on the landing light." Jiang Desheng: "The landing light is on." Kang Longlin: "The landing checklist is completed. Next you drive. " Jiang Desheng: "OK, I'll drive." After that, Jiang Desheng dropped the putter, but after more than ten seconds, both people in the cockpit found that the plane was not aimed at the runway. Zhongzheng Tower: "Dynasty 676, your altitude is too high. You can go around if you can't land.

Because the approach altitude of flight CI676 was too high at that time, although the OPEN DESCENT mode was used, the glide slope could not be intercepted in the throttle continuous IDLE mode. Jiang Desheng, who was in a hurry, pushed down the joystick and inadvertently lifted the automatic driving state of the plane. But this is not his original intention, but the direct result of overcorrection caused by the Nagoya air crash four years ago. Four years ago, on April 26th, 1994, China Airlines CI140 flight B-1816 Airbus A300B4-622R plane crashed in Nagoya, which caused a tragic lesson. Airbus modified the flight control software of A300. Allow the pilot to trigger a forced cut-off autopilot when the force of depressing the joystick exceeds 33 pounds. At that time, Jiang Desheng's pressure bar was obviously more than 33 pounds, and the autopilot was cut off without the crew's knowledge, but Kang Longlin and Jiang Desheng still thought that the plane was still in the state of autopilot. Unexpectedly, the improvement measures to avoid the recurrence of "Nagoya-style danger" have now become the reminder of CI676 flight four years later.

Kang Longlin: "No, the altitude is high, go around quickly! The refueling door goes around! " Jiang Desheng: "Yes, captain!" Kang Longlin: "Pull rod, pull rod go around quickly!" " Jiang Desheng: "OK, OK!" Kang Longlin: "Put away the landing gear quickly!" Jiang Desheng: "Put down the landing gear?" Kang Longlin: "Put the landing gear away! Put it away! " Jiang Desheng: "Put away the landing gear!" Kang Longlin: "Put the flaps away!" Jiang Desheng: "Yes, put the flaps away!" At this time, the throttle has been pushed back to TOGA gear, the flaps have also been put away, the aircraft has regained lift, the nose is gradually rising and climbing, and the elevation angle is gradually increasing. Kang Longlin and Jiang Desheng in the cockpit let go of the joystick and let the plane climb. In their minds, the plane under the control of the autopilot will level itself and complete the go-around action after climbing to a certain height. But what they never expected was that the plane had actually disconnected the autopilot and was in an unmanned state. The whole process lasted for 11 seconds. In these 11 seconds, the elevation of the plane quickly reached 35 and the altitude was 1723 feet. During the whole process, two people in the cockpit, the crew members of the former Taiwan Province Air Force senior pilots, sat in their seats without saying a word as if they had been hit by a dart. At first, the air traffic controller of Taipei approach station found that flight CI676 was climbing rapidly at an elevation exceeding the required elevation, which was strange. He hoped to contact the crew to confirm the situation, but after several calls, he found that there was no response at all. At this time, the call frequency of CI676 had been switched to the tower frequency of Chiang Kai-shek Airport, so the call of Taipei approach station could not be heard at all, and the last chance was lost.

The tower of Zhongzheng Airport found that the flight attitude of CI676 was wrong, and immediately asked by radio: "Dynasty 676, confirm the go-around?" Kang Longlin: "676 confirms go-around! Oh, ho! Oh, my God! Oh, my God! " Stall alarm sounded in the engine room, and the joystick shook violently, which is also a typical feature of stall alarm. Kang Longlin: "Turn on autopilot! Open it quickly! " Although Jiang Desheng had to turn on the autopilot, he could not get through because the elevation and airspeed of the plane exceeded the envelope limit at this time. At this time, the elevation angle of flight B-1814 of CI676 has reached a terrible 47.2. After the altitude reached 2327 feet, the airspeed decreased to a miserable 43 knots, which was no longer supported, and the plane completely stalled. During this process, the crew tried desperately to lower the elevation angle, but it had no effect because it was already in a stall state. Soon, the plane completely lost power and the nose suddenly plunged to the ground. “Terrian Terrian——”“pull up! pullup!” Zhongzheng Tower: "China Airlines 676, you can go around if you can't land. Dynasty 676, you can go around if you can't land! " Kang Longlin: "Pull it up! Pull it up! " “pull up! pullup!” Jiang Desheng: "The height is too low! Pull it up! " “pull up! pull up!” Kang Longlin: "It's over! It's over! Pull it up and pull it up! " “pull up! pull up!”

At 20: 04, the Airbus A300B4-622R of China Airlines flight CI676 B-1814 crashed at a dive angle of 30 degrees on the section between No.715 and No.721, the second section of the International Road of Taipei Zhongzheng International Airport, and then disintegrated and violently exploded, causing a fire. All 196 people on board were killed. In addition, a residential building and a car on the ground were directly damaged (and three other houses were damaged to varying degrees).

Probably cause:

First of all, during the approach of flight CI676, the plane was higher than the normal glide slope. One of the pilots (generally thought to be co-pilot Jiang Desheng, but it is also said that it was captain Kang Longlin) deliberately pressed the joystick to lower the altitude of the plane as soon as possible, resulting in the autopilot being accidentally released without the knowledge of the two crew members. Secondly, there is a lack of coordination and mutual supervision between the units, and they completely go their own way. Finally, after the decision to go around, the crew didn't check the autopilot status at all, thinking that the autopilot was still working normally, and failed to do anything for 11 seconds, so that it was too late to find that the attitude of the plane was wrong. After the air crash of flight CI676 in Dayuan, China Airlines grounded all Airbus A300 passenger planes (14 in total, 12 left after two crashes), and all pilots re-examined the simulators in batches. In the first two simulator examinations, more than a dozen pilots failed every time. The top management of "China Airlines" was furious, and all A300 pilots were sent back to the flight school in batches for short-term theoretical study and operational study, and they could only go around after passing the examination.