Originally Posted by
GordonR_Cape
I find it moderately interesting that the case chosen for evaluation is runaway nose up trim, which is an urgent stall hazard. Presumably nobody in 1982 could visualise the hazards of runaway nose down trim, perhaps due to the limited range of trim travel allowed by the autopilot in the flaps down condition. As the article notes, assumptions made five decades ago, are still propagating through today's 737 flight controls.
You seem to have missed the sentence "if nose up trim is required". Somebody in 1982, did in fact "visualise (sic) the hazards of runaway nose down trim".