Query regarding TCAS.
During a sim session yesterday (ATC) we were discussing transponder failures. The scenario was then posed if aircraft A has a transponder failure (lets say mode A and C) and aircraft B with a fully serviceable transponder comes within range of a TCAS RA is it reasonable to say
1/ Aircraft B will receive no TA/RA BUT Aircraft A will
2/ Aircraft B will receive no TA/RA NOR will Aircraft A
The question(I guess) is whether or not an aircraft requires a serviceable transponder to RECIEVE TCAS instructions.
Thanks in advance
EW