Who the hell said anything about disabling auto-pilot? Just auto-trim... Not sure where you are getting this from, did I misword something in my post that has lead you to suggest they turned off the entire AP system? I am merely suggesting someone hit stab cut-off.
How do you think AP works? There is no "disable MCAS" switch. The stab cutout will disable MCAS but it also disables your electric trim (talking about the electric trim operated by the pilots with their thumb on the yoke) and AP itself.
You would be taking off and flying the entire flight without AP and without electric trim, only the manual wheel
Before you say 'wow that would be so weird I have never heard of it', there was a report in the Nasa database of an AA flight crew doing EXACTLY that, for EXACTLY this reason. (edit: I may be getting the soources or airlines mixed, but it was reported in this thread already, just not going to search for it).
I would have to have more context before commenting, and hey, I could be wrong, yes. But I'd be surprised if this is a normal occurrence by crews on passenger flights day after day condoned by the airline. My AA 737 NG/MAX friend didn't indicate he was doing much different, but that is an anecdote and I didn't really ask too many details
If you have a better explanation for a lack of climb performance (on take off) than incorrect trim when airspeed is well above what is needed to climb, PLEASE share it.
I don't and that is my point--I don't know why or even if there actually was a lack of climb performance. I don't have a better explanation and I'm not going to pretend I do. I don't think anyone on this forum has one, I don't think most aviation professionals do, I bet even the investigators probably don't have enough knowledge to make a certain assessment
I don't think anyone is suggesting otherwise. I certainly am not. I agree fully with your last part of the statement (hell I even agree with some of your cautions before that point), not sure why this bit of speculation is the one you chose to single out though where there are 50+ pages of largely speculation here. At least mine I tried to fit the observed paramaters to address the TAKE OFF and INITIAL CLIMB portion of the flight.
I suppose it's a fit, but it's a forced fit IMO, does not seem realistic.
I don't want to appear that I am targeting you, I merely jumped into the discussion around where your post was. I take issue with 1: how certain you sounded in your post, considering how unlikely your scenario sounded based off my, admittedly, light 737 NG piloting (just short of 1000 hours) and 2: the whole notion that we currently need an explanation. Wording like "if you have a better explanation" kinda proves my point... whether or not I have an explanation, a better one, lack of one, educated or non-educated guess, etc is irrelevant to whether yours makes sense. It's perfectly valid of me to sit back without a formed opinion and poke holes in the opinion's of others. If I make a claim, then I'll be required to back it up