A Tibet Airlines Airbus A319-100, registration B-8691 performing flight TV-9918 from Mianyang to Lhasa (Tibet), landed on Lhasa's runway 28R in gusting winds. The aircraft veered to the left, the nose gear struck two runway edge lights.
China's CAAC released their final report in Chinese only. Editorial note: to serve the purpose of global prevention of the repeat of causes leading to an occurrence an additional timely release of all occurrence reports in the only world spanning aviation language English would be necessary, a Chinese only release does not achieve this purpose as set by ICAO annex 13 and just forces many aviators to waste much more time and effort each in trying to understand the circumstances leading to the occurrence. Aviators operating internationally are required to read/speak English besides their local language, investigators need to be able to read/write/speak English to communicate with their counterparts all around the globe).
The report concludes the probable causes of the serious incident were:
At the time of the incident, Lhasa Airport was experiencing strong winds and turbulence. During the landing and taxiing process, there were sudden and significant changes in wind direction and speed. A sudden crosswind occurred in the middle section of the runway.
The thin air at high altitudes reduced the effectiveness of the rudder, and the high-altitude ground speed delayed the timing of the nose wheels response to directional control.
Additionally, due to the combination of high-altitude hypoxia and dim lighting, the flight crews ability to perceive the external environment and correct deviations was impaired.
The combined effect of these factors caused the aircraft to veer off the runway edge.
China's CAAC released their final report in Chinese only. Editorial note: to serve the purpose of global prevention of the repeat of causes leading to an occurrence an additional timely release of all occurrence reports in the only world spanning aviation language English would be necessary, a Chinese only release does not achieve this purpose as set by ICAO annex 13 and just forces many aviators to waste much more time and effort each in trying to understand the circumstances leading to the occurrence. Aviators operating internationally are required to read/speak English besides their local language, investigators need to be able to read/write/speak English to communicate with their counterparts all around the globe).
The report concludes the probable causes of the serious incident were:
At the time of the incident, Lhasa Airport was experiencing strong winds and turbulence. During the landing and taxiing process, there were sudden and significant changes in wind direction and speed. A sudden crosswind occurred in the middle section of the runway.
The thin air at high altitudes reduced the effectiveness of the rudder, and the high-altitude ground speed delayed the timing of the nose wheels response to directional control.
Additionally, due to the combination of high-altitude hypoxia and dim lighting, the flight crews ability to perceive the external environment and correct deviations was impaired.
The combined effect of these factors caused the aircraft to veer off the runway edge.
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