Differences being, the horizontal stab AOA is suddenly and significantly increased with flap extension, and would be likely to stall before any stall warning device in the aircraft were to activate, since these devices measure main wing AOA, which would be DECREASED with flap extension..the video, while enlightening, also mentions increasing power exacerbates the tail stall...on a conventionally configured tailplane aircraft..no mention of effect or lack of on a T-tail model...a THS..trimmable horizontal stab configuration minimizes the possibility for a contamination-induced stall, as it is "trimmed" into the relative wind...only turboprop I ever flew with this configuration was the Metroliner...
Threat: Tailplane icing..loss of control..failure to differentiate between stab, or mainwing contamination aircraft reactions.
Additive factors: Organizational anomaly..regulators, manufacturers, operators failure to address and provide timely information, and procedures to address this hazard..
the above is no condemnation of the crew's reaction to the situation..merely an observation that the necessary information was not available to allow the crew to respond properly..
Last edited by ironbutt57; 27th Mar 2009 at 05:28.