Traffic collision avoidance system: Difference between revisions

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TCAS II: As of 2018, ACSS is a joint venture between L3Harris and Thales. L3 Technologies and Harris merged in 2018.
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Boeing 737-300, D-ABEK and Gulfstream IV, N77SW, 26 February 1999
|publisher=[[Air Accidents Investigation Branch]]|archive-url=https://upload.wikimedia.org/wikipedia/commons/0/07/Boeing_737-300%2C_D-ABEK_and_Gulfstream_IV%2C_N77SW%2C_26_February_1999.pdf|url-status=live|archive-date=2018-08-07}}</ref>
* [[2001 Japan Airlines mid-air incident]]; where the Captain of Japan Airlines Flight 907 (a [[Boeing 747-400]]), 40-year old Makoto Watanabe ({{lang-langx|ja|渡辺 誠|translit=Watanabe Makoto|label=none}}), chose to descend, ordered by the air traffic controller, when TCAS told the flight crew to climb, nearly colliding with the descending JAL Flight 958 [[McDonnell Douglas DC-10|DC-10]] en route from [[Gimhae International Airport|Busan]] to Tokyo's [[Narita International Airport|Narita Airport]].
* [[2002 Überlingen mid-air collision]], between a [[Boeing 757]] and a [[Tupolev Tu-154]], where the Tupolev pilots declined to follow their TCAS resolution advisory (RA), instead following the directions of the air traffic controller, while the Boeing pilots followed their TCAS-RA, having no ATC instruction.
* 2006 collision between [[Gol Transportes Aéreos Flight 1907]] (a [[Boeing 737]]) and an [[Embraer Legacy 600]]; the Embraer's transponder had inadvertently been switched off, disabling its own TCAS and rendering the plane invisible to the TCAS on board flight 1907.