Originally Posted by
Discorde
An aircraft dropping through the levels at a very high rate of descent might trigger an avalanche of interreacting TCAS RAs in surrounding traffic which in turn might jeopardise safe separations.
Can modern ATC and TCAS systems adequately deal with such an event? (I ask as someone who retired from the business 14 years ago.)
To my understanding the adverse effect is negligeable, the case is well understood and contained by ACAS II specification.
Upon closer inspection, the actual RAs caused by the hypothetical airplane slicing through busy levels from the above will not be that many. Without ATC coordination that is.
(Answering as someone who stopped teaching TCAS 7.0 vs. 6.04 in EUR RVSM airspace also 14 years ago
)