Earlier quoted context omitted.
Didn't the crew save the airplane because there was a third person there to help manually trim as the force required was too much for two people alone, whilst also having to pull back on the yoke with massive force? That means it was dumb luck (a third person being there) and not due to following procedures if those procedures are nearly impossible to follow, or require superhuman strength.
No; the third crew member on prior Lion Air flight (043) is the one who diagnosed the issue as runaway trim and cued the flight crew to execute that checklist. I've read nothing to suggest that they participated physically in the response (despite having read quite a bit on the topic). The excessive force on the trim required in the Ethiopian Air case was a consequence of the crew leaving the engines at high power, t…
From an armchair perspective a checklist for AoA sensor failure would have been required for the flight to end safely (maybe with "cutoff stab trim" on the list).