A good man indeed, Dalek, and one that reminds us yet again that for evil to happen it merely requires good men to do nothing. This one though stood up to be counted, but unfortunately was the exception rather than the rule. There comes a point when, whether one is "allowed" to or not, it is necessary to emulate Witness J's example.
Being ordered to accept the "DS solution" cause of an accident and to ignore the real one constitutes an illegal order in my book. Just because the SS ones concerned grenades, POW's and barns doesn't mean that other ones, concerning airworthiness, known faults, and a subsequent illegal RTS, aren't.
It's a simple enough concept, know what is right and what is wrong. Always do what you know to be right. All the rest is rhetoric.