[inferiorhuman]

Overspeed is the result of the mistrim

No, it wasn't. Overspeed was because the pilots basically firewalled the throttles and never once touched them. Look at the Lion Air flights, they never came close to those sorts of speeds.

[cmurf]

If I'm trimmed for level flight and go to 100% power, I will not overspeed. Initial airspeed increases, the plane starts to climb, airspeed decreases, and fairly quickly without any other inputs the airspeed will return to level flight airspeed, but I'll be in a climb. It's basic aerodynmics. Primary flight students are taught this, and in more advanced training it's given a name: positive static stability. All FAR 23 and FAR 25 certified airplanes have this behavior.

In the case of ET302, the power settings were completely normal for the phase of flight they were in. What was abnormal was the trim. If the trim were normal, they would have had a normal climb and normal climb speed. On what basis would or should the pilots have made a power reduction?

In the case of LNI034 and LNI610, you're determining speed how? Do you have a page reference? Are you even able to estimate percent Vno? What I see for LNI610 is normal takeoff power, and just before midway through the flight a power reduction. Airspeed isn't affected. And how are you comparing the stabilizer trim setting value between LNI610 and ET302?

[inferiorhuman]

In the case of ET302, the power settings were completely normal for the phase of flight they were in.

N1 was nearly at 100% for most of the flight. ET302 had an unreliable airspeed situation, yeah? My understanding is that the memory items for this on the 737 involves setting the throttles to well less than 100% (closer to 80-85% is what I've seen). Honestly I thought climb thrust was around 80% as well.

On what basis would or should the pilots have made a power reduction?

Both the overspeed clackers were going off for much of the flight (granted so was one of the stick shakers — at the same time).

In the case of LNI034 and LNI610, you're determining speed how?

The initial leak of the preliminary report included units with the graphs.

https://ngamotu.nz/images/20181122-jt610-knkt.pdf

[cmurf]

Another example of Dunning Kruger effect here. I assume you're competent at something, that's as polite as I can be. But the way you willfully ignore my power and trim explanations and yet continue to armchair pilot by mischaracterizing the importance of the power setting, while also implying the pilots were incompetent, is shameful. But you are so incredibly ignorant, you have no idea, so you persist in being obtuse. That is how a real pilot and flight instructor will view your characterizations. And even as I try to school you, you ignore it. Your defect is significant enough I do not have the time or interest in schooling you anymore.

FAA emergency airworthyiness directive 2018-23-51 directly contradicts much of what you are saying and implying.

The PDF you cite, if authentic, and if the units are the same between LNI610 and ET302, indicate substantially more nose down trim for ET302. And that is consistent with the airspeed differences, not power.

Since you seem eager to accept more rope and hang yourself with it: ET302 05:41:15, take the airplane state at that time, and only do a power reduction, explain what you think will happen and why, in sequence with and emphasis on the force changes that happen including change in attitude.