Originally Posted by
infrequentflyer789
Originally Posted by CaptainGef
Speed is decreasing and as speed is decreasing, they don't see it and what does the THS do on FBW machine?: It tries to maintain flight path, so as speed is decreasing to maintain flight path the autotrim goes up to the limit, incidence is growing up to maintain flight path.
On a Boeing, even in alternate law, you would have to trim as speed decrease to maintain flight path, it would alert you that something is wrong.
Autotrim will do
exactly the same on a boeing if the automatics are trying to maintain a flight path (with speed decreasing). See Schipol 737 and similar accidents/incidents.
Not a FBW issue, not an AB issue.
This is a drastic speed decrease, all the way down to a Stall condition, which is determined, and announced for 53 seconds by the "a/c's controls". Stall means fall !!!!
During these 53 seconds, of definite Stall Condition, determined by the a/c's computers, the THS went also under the a/c's computers control from -3 to -13 degree, which is MAX Nose Up, which is exactly the opposite of what in a Stall condition the pilot, or the computers should be commanding.
Personally, I would not consider this a FBW issue, in the sense of the FBW being a system in which the medium for transferring/passing bi-directionally control information is wire.
Is this really not an Issue??? if Boeing is doing to wrong thing, it is OK for AB to do the same?