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Printed page 8. PDF page 10.
The CVR recorded that both the PIC and the copilot called out "traffic, traffic". At 21:34:49 hrs - i.e. seven seconds later - ACC Zurich instructed the crew to expedite descent to FL 350 with reference to conflicting traffic ("......Open final report at PDF page 10BFU AX001-1-2/02: collision near Ueberlingen
Printed page 70. PDF page 72.
after the TA the crew was in a certain anticipation of an avoidance ma- noeuvre. At 21:34:49 hrs - seven seconds after the TA - the controller of ACC Zurich instructed the TU154M crew to descend to FL 350 becauseOpen final report at PDF page 72BFU AX001-1-2/02: collision near Ueberlingen
Printed page 75. PDF page 77.
the optical STCA was not available. When the controller instructed the TU154M crew at 21:34:49 hrs for the first time to expedite descent to FL 350 the horizontal separation was practically already below 7 NM (exactly at 21:34:56, when theOpen final report at PDF page 77BFU AX001-1-2/02: collision near Ueberlingen
Printed page 100. PDF page 102.
the instruction of ACC Zurich and the TCAS RA. At 21:34:42 hrs TCAS issued a TA. At 21:34:49 hrs, the ATC descent instruction was received and the PIC immediately commanded a descent, but at 21:34:56 hrs a TCAS `climb' RAOpen final report at PDF page 102BFU AX001-1-2/02: collision near Ueberlingen
Printed page 109. PDF page 111.
notice the imminent separation infringement in time. He instructed the TU154M crew at 21:34:49 hrs (43 seconds prior to the collision) to descend to FL 350 which was too late to ensure the required separation to the B757-200. The phraseologyOpen final report at PDF page 111BFU AX001-1-2/02: collision near Ueberlingen
Printed page Appendix 1, unnumbered sheet. PDF page 1.
Track TU154M 21:35:19 21:34:42 KEMPTEN 21:35:10 TRASADINGEN 21:34:56 NEGRA 21:34:42 21:34:49 21:34:56 21:35:03 KUDES Track B757-200 h Zuric5 AC FC L 24 Luftraobeu rmhalb 21:29:50 FL 360Open official document at PDF page 1BFU appendices 1 and 3