ATC Watcher: says "... The Collision avoidance logic (CAS) has also its flaws, especially in issuing reversals, (and Ueberlingen is a perfect example of this), but that is another story."
Ueberlingen appears to be a flaw about the Russian pilot belatedly following ATC instructions rather than his correct TCAS Resolution Advisory.
Upon receiving a "Traffic" advisory, my technique is to note the traffic quadrant where the target is, then switch the TCAS screen immediately to the 5 mile range, or as a last resort down to the 3 mile range, which as a last resort would afford me the option of a lateral maneuver away from the target, in addition to simultaneously following the vertical RA instructions.
I believe that the DHL crew at Ueberlingen could have sharply turned away from the target while complying with the vertical RA instructions. The radar plot did not record such an immediate turn, and as it was, the 757 tail had sliced into the TU-154.
