News for hackers. Stuff that matters.
Re:Plane Tests Must Use Average Pilots, NTSB Says After 737 ... by joe_the_user on Friday September 27, 2019 @04:24PM (#21095931)
I believe my position is that of the strong consensus of the long debates that have gone on in detail here and in numerous mainstream and technical publications. I can't summarize all the arguments there and I won't try but the conclusion has been Boeing is to blame (period).

In this day and age, I'm suspicious and annoyed even small effort to improperly spread blame when that spreading serves powerful interests.

Re:Plane Tests Must Use Average Pilots, NTSB Says After 737 ... by mlyle on Friday September 27, 2019 @04:28PM (#21095967)
Basically all of aviation safety is about the spreading of blame and plugging up holes.

Either approach is wrong: just pointing to the pilot and saying "hah-hah error" without considering what led to the error is what aviation did for decades. "Crash less!" we said to pilots, and were surprised when things didn't improve much. But you can't ignore crew performance, either.

The crews that crashed did not do great. But if a system is regularly putting crews to the test in a way that requires high levels of personal performance to survive, that's a bigger problem.

And MCAS is more easily improved than the rest: we can more easily reduce the frequency and severity of that "testing" than we can improve all flight crews. But we shouldn't ignore the problems in crew decision-making, and the related training choices (e.g. not requiring crews to demonstrate handling of runaway trim in some jurisdictions).

Re:Plane Tests Must Use Average Pilots, NTSB Says After 737 ... by salawat on Friday September 27, 2019 @10:24PM (#21097978)
>The crews that crashed did not do great.

Not necessarily fair since one didn't even know what they were up against, and the other was trusting a Boeing checklist that wasn't guaranteed to work, and only stood a realistic chance at working if the failure did not occur at a critical stage of the flight, where a currently undocumented maneuver could be performed. (The 'roller coaster' by which the pilot allows the plane to dive to unload the stabilizer so it can be trimmed)

>And MCAS is more easily improved than the rest: we can more easily reduce the frequency and severity of that "testing" than we can improve all flight crews. But we shouldn't ignore the problems in crew decision-making, and the related training choices (e.g. not requiring crews to demonstrate handling of runaway trim in some jurisdictions).

This is just poppycock, if you ask me.

MCAS was a desperate attempt to satisfy a prescriptive behavior requirement (FAR 25.173, demonstration of longitudinal stability) during which the plane should not experience slackening control forces all the way to the stall in a wind up turn, which non-compliance with would disqualify the airframe from certification under the grandfathered 737 type certificate and as a Civil Transport Airplane.

There would have been no need to consider the skill of the pilots if due diligence and proper redundancy concomitant to the actual hazards of the design had been done, which weren't due to management's pressure to get this damn plane flying on time at any cost.

Re:Plane Tests Must Use Average Pilots, NTSB Says After 737 ... by mlyle on Friday September 27, 2019 @10:30PM (#21098007)
> Not necessarily fair since one didn't even know what they were up against, and the other was trusting a Boeing checklist that wasn't guaranteed to work, and only stood a realistic chance at working if the failure did not occur at a critical stage of the flight

Well, it did get them back to positive rate climb, didn't it? :P Just, dubious subsequent actions gave that back.

> This is just poppycock, if not straight up, grade A bullshit; no personal disrespect intended to you, fine sir.

Well, it is absolutely personal disrespect, and adding qualifiers amplifies rather than undoes it. A decent person should do better.

> There would have been no need to consider the skill of the pilots if due diligence and proper redundancy concomitant to the actual hazards of the design had been done, which weren't due to management's pressure to get this damn plane flying on time at any cost.

I already said MCAS is awful, kthx? At the same time, it's exposed that many air crews in developing countries don't know how to deal with trim runaway. And trim runaway happens: switches get stuck. So the other links in the failure chain should be dealt with, so that they don't conspire to bring down aircraft under other conditions.