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“But we did not know the limit being exceeded would have such an effect,” he said.
Tam urged the department to look into possibility of purchasing another system, and reserve the former system – now kept in standby status – in case it was required.ĭeputy Director-General of Civil Aviation Kevin Choi said on a RTHK programme on Monday the department knew that the new system has a limit related to users’ personal preferences when it was installed.
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Tam noted that there was an update provided by Raytheon on March 20, and warned that if the issue was caused by a software glitch, the fallback system may also encounter the same problem. “When will the Civil Aviation Department ever admit there is a problem?” he said. He questioned why the department did not reveal how many flights were affected once the incident was reported. The department had reported the leaking of a radar image from the system to the police following previous incidents.Ĭivic Party lawmaker Jeremy Tam Mai-ho, a former commercial flight pilot, said that the confidence air traffic control officers and the public had in the system “has almost collapsed.”
However, it has been plagued with dozens of malfunctions such as the display of non-existent planes, flight data disappearing, false instances of flights overlapping, and false collision alerts.
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The system, known as AT3, came into full use in November last year. US-based Raytheon was awarded the HK$480 million ATMS contract in February 2011. It added that air traffic control officers were able to keep direct voice communication with the pilots at all times and obtain all necessary flight information through Automatic Dependent Surveillance–Broadcast technology. “Although only the essential information (including their position and altitude information) were shown for eight flights during the occurrence, all flight targets were continuously displayed on the radar screens,” it said in the Sunday statement. The department said that, according to an initial investigation by the contractor’s representative, the incident was believed to be caused by an “accumulation of users’ preferences settings exceeding the preset system limit.” Officers can make personalised preferences on the system such as font size and items on the menu. Technical staff switched to the fallback system at 11.40am and information on the radar was restored. The department said air traffic control officers deferred giving clearance to departure flights for about 15 minutes as a precaution, but arrivals and planes already in the air were unaffected. The incident was confirmed by the department after media reports on Saturday citing anonymous air traffic control sources. The fallback system is a separate but identical system to the main system. The new air traffic management system at the airport.
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Gov't admits glitch caused Hong Kong's new air traffic control system to lose track of data related to 8 flights - Hong Kong Free Press HKFP Close
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