Comment by macintux
2 days ago
> This idea strikes me as even more unlikely than someone shifting their moving vehicle into reverse while intending to activate the window wipers.
I suspect you've never driven an older vehicle with the shifter on the steering column.
Or a Tesla. I've done this exact thing, although the car just beeped at me and refused to go into reverse, of course.
But if he did, would have done hours of retraining in a simulator?
Or even crazier, a manual shift on the steering column. Nothing weirder than pushing down the clutch and then changing the gear with your hand on a knob off to the side of the steering wheel.
Like in a Citroën 2CV?
> I suspect you've never driven an older vehicle with the shifter on the steering column.
Or a new Mercedes ;)
The pilot wasn’t flying an unfamiliar aircraft.
I think the aircraft being familiar makes it worse: if you're used to going through a certain motion to do a thing, it may be one of things your brain can do without really thinking about it much, which is where the danger comes in.
I've engaged my wipers when meaning to shift gears before, in my truck which has a steering column shifter. After driving the truck for years. I have ADHD and I very often let my brain go on autopilot for things I do every day, and sometimes it just does the wrong thing. It doesn't matter how complicated or "intentional" the task has to be: my brain will memorize it to the point that it can execute it on its own without me consciously thinking about it.
I think it's totally plausible it was a muscle memory thing, if the at-fault pilot's brain works anything like mine.
(Side note: I actually took some flying lessons, including going through all of ground school, and realized that my brain is just not cut out for flying. I am the type of person to "cowboy" things if I feel like they're not worth doing, and flying is an activity where the tiniest missed checklist item can result in death, so I realized I have a statistically high likelihood of crashing due to some boneheaded mistake, and stopped taking lessons.)
There is no temporal nor spatial adjacency to the switches. The switches are equivalent to the ignition on your car, you operate it in the beginning and end of your trip, and there is nothing during the trip that will involve manipulating this switch.
If your wipers had the equivalent of a child safety cap it would be hard to do it accidentally, especially twice in a row.
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But the 787 doesn’t have an easily confused layout like that. The landing gear lever and fuel cut off switches are not two stalks on the yoke. Aircraft cockpits are deliberately designed in such a way that important things have differently shaped actuators that feel different from each other. Precisely so that you are not accidentally flipping the wrong switch by accident.
Actually the birth of Human Factors was related to this... Alphonse Chapanis, a psychologist working at the Army Air Force Aero Medical Lab in 1942, investigated the issue and discovered a design flaw. He observed that the controls for the flaps and the landing gear in the B-17 cockpit were nearly identical and located close to each other.