5 ms·
The article states: "When MCAS senses that the angle of attack is too high, it commands the aircraft’s trim system to lower the nose. It also does something el
by laydn 7y ago
The article states: "When MCAS senses that the angle of attack is too high, it commands the aircraft’s trim system to lower the nose. It also does something else: It pushes the pilot’s control columns downward"
No, it does not push the pilot's control columns downward.
- Declanomous 7y agoI think that the author is mistaking the fact that trimming the plane forward means that more force is required to pull back on the yoke for the plane actively pushing the yoke forward.
- cjbprime 7y agoYeah, maybe also some Boeing/Airbus confusion. The author doesn't seem to understand the extent to which the 737 cockpit is mechanical, with cables running to control surfaces. It's an important point because it likely explains why the Ethiopian pilots were unable to regain control after disabling electric trim, becoming overpowered by aerodynamic load on the stabilizer.
- mfer 7y agoIn newer 737 versions it's no longer cables... http://www.boeing.com/commercial/aeromagazine/aero_02/textonly/sy01txt.html http://www.boeing.com/commercial/aeromagazine/aero_02/texton...
- ReGenGen 7y agoFYI That doc is about "Propulsion Control Systems" not elevator trim or control surfaces.