In which way did the TCAS contribute to this accident? As I understood it they would have been fine if the Tupolev had followed the RA.
True.
But EQUALLY true that if NEITHER had had TCAS and BOTH had followed ATC instructions, it would also have been avoided.
It's a prime example of how simply introducing a new magic box does nothing to improve saftey, and can be detrimental if it is not universally used correctly.
This accident is a case in point. Would it have happened if the AC hadn't HAD an autothrottle?
MU, agree entirely about stabilised approach criteria, but a rock solid culture of SOP adherence, total non-sanction (indeed, make it non-reportable) for a go-around due not being stable, and arse-kicking-to-follow if you press on works just as well as a new GPWS warning. People are capable of ignoring those too!