20+ degree down angle inside of three seconds. The negative G sent them to the roof. I'm a certified fight instructor, and I've never experienced negative G.
MCAS killed them.
No, but overspeed does.
> A power reduction for transport category airplanes always causes a nose drop a requirement of certification
Please cite. If you point to 25.173/25.175, note that it refers to trim speeds and return to trim speed, not power. The plane was climbing before crossing Vmo / power could be reduced to maintain Vmo and the current climb rate.
> I'm a certified fight instructor, and I've never experienced negative G.
What? You've earned a spin endorsement, then. You've experienced the little negative G (in most planes) as you tip and enter the incipient spin. It's fun. The first time I did it I said "oh shit" and let go of the yoke to grab my seat. :P Also kinda alarms me that if you're an instructor you've never pushed a little negative.
Like I told you before: overspeeding the plane, preventing them from restoring the trim condition with the trim wheel.
I get that if you're not climbing as much as you'd like, it's tempting to have a ton of power in. But the maximum airspeed of the plane is chosen because there are undesirable handling characteristics -- like not being able to manually retrim, or even worse things like aileron reversal-- above it. At some point you need to pull back power.
If you're out of trim because of electric trim misbehaving, turning electric trim back on may not be the smartest thing, too.
And then I can't even understand what happens next: if you touch the trim switch, MCAS can't do stuff for awhile. If they're going to re-enable electric trim, why didn't they then fully fix trim with the trim switch? How is MCAS able to actuate and worsen the existing out of trim condition?