5 ms·
But this directive said "handle like a trim runaway". However MCAS may present itself differently from a trim runaway when failing. Furthermore a failing sensor
by chopin 8y ago
But this directive said "handle like a trim runaway". However MCAS may present itself differently from a trim runaway when failing. Furthermore a failing sensor may activate the stick shaker and the last thing a pilot is trained to do is pull up in such a situation. So you might get:
- unreliable airspeed warning
- stick shaker (=stall is imminent)
So you don't know your airspeed (otherwise you can conclude you're safe for your current pitch and vertical speed) and a stall warning. The last thing you do is to look for horizontal trim.
- VBprogrammer 8y agoThe full list of potential indications is included in the AD. It also describes the operation of the trim system under MCAS control. You can see them in the Lion Air preliminary report linked above. Pilots are trained to deal with partial panel situations. The mantra is pitch + power = performance. In VMC this should be well within the capibilities of a normal pilot, put the nose on the horizon and set something like 65% power.