3 ms·
Wait, what? Reading this is turns out that flipping both switches on the centre panel not only deactivates MCAS, but also deactivates the thumb switch on the co
by cyberferret 7y ago
Wait, what? Reading this is turns out that flipping both switches on the centre panel not only deactivates MCAS, but also deactivates the thumb switch on the control wheel that the pilots routinely use to change the elevator trim.
So, MCAS trims the plan to a dangerous attitude, then when pilots follow Boeing's SOP to disable, they lose the ability to re-trim the way they have done it a million times before? I can see valuable second being eaten up when pilots flick the thumb switch towards them and sit there wondering why the back pressure isn't easing up.
And the report also says that the manual trim adjustment wheel would be harder to move due to the load on the tail when the aircraft is in a nose (death) dive? This is already on top of the fact that the pilots have to hold around 60Kg back pressure on the control wheel while leaning forward to crank the manual trim wheel?
Recipe for absolute disaster.
- cjbprime 7y agoYes, exactly. The MAX "stab trim cutout" simply disabled the trim motor altogether. Everything you describe appears to have happened in the Ethiopian flight report. A 737 pilot also tried to run the same flight in simulator and had his arms wrapped around the control column trying to hold level while the copilot failed to move the trim wheel.
- rasz 7y ago>737 pilot also tried to run the same flight in simulator https://news.ycombinator.com/item?id=19627660#19627755 https://news.ycombinator.com/item?id=19627660#19627755 That video was removed :(