Originally Posted by
Icarus2001
Us mere mortals turn off the stab trim.
Icarus, did you miss the lesson on Safety Management or were you too busy polishing your Ray-Bans?
I'll try and keep this simple. $120m aircraft has a single point of failure (AOA vane) that will subsequently cause HAL to become suicidal. The
ONLY layer of safety in place now is Biggles and Biggles Minor who are expected to treat that failure with the flick of a switch. At this point any sensible person in our industry will already be sucking their teeth at the risks and lack of inherent safety protections. But this one gets better because Biggles didn't even know about the existence of this failure mode or how to resolve it (flick the switch). Nothing in his QRH/AFM, no training, nyada. For sure, there's something called a trim runaway but he's not sure this is a runaway because it's stopping.......... thump.
Perhaps Biggles could have done better. I'm pretty sure Boeing could have done far better.