@ RR_NDB and jcjeant:
Agreed, yes - one interpretation is that the PF was basically "trying things", to see what happened, at least on some occasions (e.g. the speedbrakes). I had written something very similar in an earlier draft of my posting, but I deleted it, to try to be brief
So we're thinking along similar lines, I believe.
From that standpoint, the various actions from the PF make a little more "sense" IHMO. If he was indeed in that "let's try X and see if it helps" mode, then perhaps the intermittent stall warning helped to drive & reinforce exactly the
wrong actions from him. As I think most people agree, on some occasions, it seems that he stopped doing the correct (ND) inputs, when the SW started to sound, as if he was "testing" his ND actions, to see if they helped, without the real "belief" that this was the right thing to do. (Before anyone says it, yes, I know this doesn't explain the lack of
apparent recognition / acknowledgement of the 50+s of continuous stall warning initially.
)
@jcjeant - re your OT: I have seen many similar examples of that type of poor troubleshooting too
Yours is a good example of someone guessing at a (wrong) diagnosis, and not confirming that it explains the available data (e.g. oil temperature & pressure). Thanks for that story.