TCAS RA when at max alt
i accept that these a/c were not flying at their max alt, but I was wondering if a 'TCAS expert' could answer this question. If 2 a/c at say 42000 on an intercept course with resulting TA followed by RA would one a/c be given a command to climb? and would this be wise to accept if it took the a/c above its max operating altitude and close to 'coffin corner'.
Or does the system take into account a/c performance when commanding an RA? If flying at high altitudes would TCAS command one a/c to descend and another to maintain its level?