Before revision: 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.
After revision: not2002 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.