Originally Posted by
Albino
I disagree....
Boeing ARE responsible for a poorly designed system, I've yet to meet anyone who doesn't feel the MCAS should not have been certified, allowed to work from a single sensor or able to make the level of input that it does.
Where the difference of opinion lies is that Boeing are solely responsible, particularly for the Ethiopian crash. Their press release stated that all procedures were followed and press around the world are stating as fact that this was completely the fault of the aircraft.
Looking at the information released it is hard to agree. Procedures were not followed. Control of the aircraft was not maintained. The crew had direct control over the stabilizer (apart from when the cutouts were used) at all times. Flying the aircraft is the most basic aspect of our job and the most important.
My final post on this topic.
The primary problem is the design. PERIOD
It’s fine when things are normal, deadly when they are not. It was not designed for fault tolerance. If AOA inputs are invalid, perhaps with IAS disagree, the initial procedures (pitch & power), coupled with unwanted nose down trim will naturally lead pilots to maintain proper pitch, speed increases, MCAS trim down more and on and on. Pilots hit Trim Cutout and are left with manual (slow) trim which becomes increasingly difficult to use as speed increases, until it becomes impossible. Can’t unload (nose down) at 1000 feet, and there’s too much nose down trim to control the airplane.