I certainly do not wish to challenge the veracity of nigegilb's statement:
I have also been shown evidence which indicates that ZD576 was carrying STF equipment on that fateful day
But we have to complete the loop here so we don't keep going around in circles,
there is no evidence I have seen that suggests that FTS equipment was on board ZD576, whether in an active, passive or redundant role. Doesn’t mean it wasn’t there, but I have read a substantial amount of paperwork and asked several direct questions on this subject and never had even a hint of any such equipment.
If it was to be proven that a redundant STF was in place, then this opens up a debate of possibilities that nigegilb and tiarna have alluded to.