AA, from an equally (more?) respected poster on this subject:
... 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.
ShyTorque also makes an extremely valid point. There are those on this forum who knew the aircraft & operating environment, were very close friends with the crew and fervently believe justice was not done. What motivation would all these people have for covering up Walter's "secret trial"?