sentences:  They also asserted that they had lost contact with Brasília ATC at the time of the collision, and their anti-collision system did not alert them to any oncoming traffic.On 2 October 2006, the Embraer's captain and first officer were ordered by the Mato Grosso Justice Tribunal to surrender their passports pending further investigation.The request, made by the Peixoto de Azevedo prosecutor, was granted by judge Tiago Sousa Nogueira e Abreu, who stated that the possibility of pilot error on the part of the Embraer crew could not be ruled out.