China Southwest Airlines Flight 4509
China Southwest Airlines Flight 4509 (SZ4509) was a domestic flight in China from Chengdu Shuangliu International Airport, Sichuan to Wenzhou Yongqiang Airport, Zhejiang. On February 24, 1999, the Tupolev Tu-154M operating the flight crashed while on approach to Wenzhou Airport, killing all 61 passengers and crew members on board.[1][2]
 A China Southwest Airlines Tupolev Tu-154, similar to the aircraft involved in the accident. | |
| Accident | |
|---|---|
| Date | February 24, 1999 |
| Summary | Mechanical failure of aircraft tail section caused by poor maintenance |
| Site | Near Wenzhou Yongqiang Airport, Wenzhou, Zhejiang, China 27°43′10.2″N 120°39′27.2″E |
| Aircraft | |
| Aircraft type | Tupolev Tu-154M |
| Operator | China Southwest Airlines |
| Registration | B-2622 |
| Flight origin | Chengdu Shuangliu International Airport, Sichuan |
| Destination | Wenzhou Yongqiang Airport, Wenzhou, Zhejiang |
| Occupants | 61 |
| Passengers | 50 |
| Crew | 11 |
| Fatalities | 61 |
| Survivors | 0 |
Aircraft and crew
The aircraft was a 1990-built Tupolev Tu-154M (serial number 90A-846, serial 0846) airliner powered by three Soloviev D-30 turbofan engines from UEC Saturn. It was initially registered in the Soviet Union as CCCP-85846. It was delivered to the Civil Aviation Administration of China (CAAC) in April the same year, and was registered as B-2622.[3]
The flight crew consisted of captain Yao Fuchen (Chinese: 姚福臣), first officer Xue Mao (薛冒), navigator Lan Zhangfeng (郎占锋), and flight engineer Guo Shuming (郭树铭). There were also seven flight attendants on board.[4]
Accident
On February 24, 1999, the crew was preparing the aircraft for landing at Wenzhou Airport. The flaps were extended at 1,000 metres (3,300 ft), but seconds after, the aircraft's nose lowered abruptly, the aircraft disintegrated in mid-air and crashed into an area of high ground, and exploded. Witnesses saw the plane nose dive into the ground from an altitude of 700 metres (2,300 ft) and explode. All 61 people on board were killed.[1][2] Several people on the ground were injured from debris.[5]
Cause
Incorrect self-locking locknuts had been installed in the elevator operating system, which maintenance crews failed to notice. These spun off during the flight, leaving the elevator uncontrollable. This disabled the aircraft pitch channel, causing the crash.[4]
Aftermath
This and the China Northwest Airlines Flight 2303 disaster contributed to the decision to remove all Tupolev Tu-154 aircraft in China from service on October 30, 2002.[1][2]
See also
- Alaska Airlines Flight 261, another aviation disaster caused by poor maintenance.
- China Northwest Airlines Flight 2303, another aviation disaster involving a Tupolev-154 and caused by poor maintenance.
- China Southwest Airlines Flight 4146, another aviation disaster caused by poor maintenance.
- Japan Airlines Flight 123, another aviation disaster caused by poor maintenance.
References
- Chan, Minnie (2017-12-24). "Why China's military relies on an ageing Russian passenger jet". South China Morning Post. Retrieved 2018-08-01.
- Wantan, Wang (July 16, 2009). "图—154机型涉30起空难 中国已经停用7年" [Figure-154 model, involved in 30 air crashes, has been out of service for 7 years in China (Chinese Simplified)]. world.people.com.cn (in Chinese). Retrieved 2018-08-01.
- "✈ russianplanes.net ✈ наша авиация" [✈ russianplanes.net ✈ our aircraft]. russianplanes.net (in Russian). Retrieved 2018-10-04.
- "关于西南航空公司"2·24"特大飞行事故结案的通知" [Notice on the completion of the "2·24" extraordinarily large flight accident of Southwest Airlines - Security Management Network (Chinese Simplified)]. www.safehoo.com (in Chinese). Retrieved 2018-08-01.Translated article (Note: this translation was made automatically from the original (in Chinese) and has low technical quality, lends itself only to specific queries)
- Ranter, Harro. "ASN Aircraft accident Tupolev Tu-154M B-2622 Ruian". aviation-safety.net. Retrieved 2019-10-05.