Yes, thanks. In the case of 447, in an unusual climb, and even before, during the first STALL WARNING, AoA and PITCH were discrepant. STALL functions from the AoA vanes, could the pilot have rejected this warning as false (it was not) for that reason?
A severe updraft, or other unexpected event could disorient a crew at a very inopportune time.....Or set the stage for a mistrust of the STALL system....
For that matter, an inaccurate or even erroneous AoA reading could trigger a protection, the aircraft is not invulnerable, (uncommanded climb).
And thank you for the Phugoid reminder. I have believed from the start that the Pilots were having a time with altitude. Whatever the PF saw, and to a lesser extent the PM, what are the possibilities of a PITCH phugoid, either real, or sensate? Such that a chronic climb derived from incorrect input?
Rhetorical, if you like....
Last edited by Lyman; 7th Mar 2013 at 17:13.