
steve2267 wrote:outlaw162 wrote:Is AutoGCAS not a player here? What is the pilot initiated automatic recovery system? The more things change, the more they stay the same.
Assuming the pilot had the backup AI in the upper right corner of the cockpit, and it was battery powered... I think your earlier comments are spot on....
Steve, there was confusion because of the SD caused by two AIs giving conflicting information when the pilot was trying to cope. Please read the quotes from the accident report or the report itself. Pilot was close to the ground (seeing the trees twice) & disorientated trying to get re-orientated however the SD has an agenda of its own. We have referred earlier to 'recognised SD but no time/altitude to recover'. This is one of those situations with Backup AI Battery Powered or not.
I did not see this mentioned in my speed reading of the report however this illusion may have played a part to bolster SD.
[quote]"...Somatogravic illusions
There are three versions of the somatogravic illusion. Both involve the body’s inability to distinguish pitch changes from acceleration.
1. The leans
This common illusion is a false sensation of roll. It gets its name because pilots lean to one side in order to cancel out the false sensation. Leaning your body is the right way to counter the leans; rolling your aircraft is the wrong response. The leans often happen when a pilot looks down at a map, radio or instruments, and the aircraft goes into a gentle, banked turn that is too slow for the vestibular system to detect. Typically, the pilot looks up, and corrects the bank. But because this correction is fast enough to be felt by the inner ear, visual and vestibular information get out of sync and the leans occur. This illusion can occur in good visual flight conditions.…" viewtopic.php?f=22&t=55255&p=421784&hilit=condition#p421784