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Written by: Zheng Qiyuan
2020-07-08 21:45
Last update date: 2020-07-08 21:45A Boeing 747-8KZF cargo aircraft of Japan Cargo Airlines, one of the engines suddenly caught fire and smoked during landing at Hong Kong Airport on March 29 of the previous year. Fortunately, no one was injured. The civil aviation accident investigation agency released the accident investigation report today (8th), which indicated that a fuel pipe of the aircraft engine involved was cracked. When landing, the ventilation flow in the fairing was low. The fuel leaking from the crack and the high temperature combustion spread Nozzle housing is in contact with fire.
The Japanese cargo air cargo plane (registration mark JA18KZ) involved arrived in Hong Kong on March 29, 2018. At the time of the incident, the cargo plane was preparing to land on runway 07L. At about 50 feet from the ground, the engine indicator and crew warning system issued the No. 3 engine fire warning message for the cargo plane. The aircraft left the runway after landing and stopped on the taxiway. The crew then notified the air traffic controller of the incident.
According to the guidelines of the International Civil Aviation Organization, the incident was defined as a serious accident. The investigation report issued by the civil aviation accident investigation agency analyzes the cause of the incident. The report pointed out that the possible cause of the accident was the No. 3 engine of the cargo plane involved, and a crack occurred in a fuel pipe. When the cargo plane landed, due to the low ventilation flow in the fairing, the fuel leaking from the cracks ignited in contact with the shell of the high-temperature combustion diffusion nozzle.
Last month, a Japanese cargo plane landed and was suspected of fire due to the crew mistakenly turning on the elevator
Two ultrasonic inspections before the incident failed to find a crack in the fuel pipe
The report also pointed out that the cargo aircraft had carried out ultrasonic inspection twice in accordance with the service announcement before the incident, but no cracks in the fuel pipe were detected. To improve the reliability of the ultrasonic inspection, the investigation team made safety recommendations. The engine manufacturer should verify the calibration, echo amplitude, and judgment reference level in the service announcement to cover the entire echo range of the inspection task.
A spokesman for the civil aviation accident investigation agency said that the civil aviation accident investigation agency issued an investigation report, the purpose of which was to find out the course and cause of the accident in order to avoid the recurrence of similar accidents.
Hong Kong International Airport Aviation Accident