Clandestino, re
“pulling full aft stick …” - normal.
To clarify the point in my post, which had previously considered the hypothesis that the crew followed the FD, then following the commanded roll and pitch could be normal behaviour.
The pilot might not appreciate the magnitude of the stick input, particularly if the FD control laws are not optimised for such a situation; also, if the FD computation and/or normal use assumes that the commands are continually nulled, i.e. a director vice a recovery indicator for a gross deviation. Thus a large roll angle and subsequent loss of altitude could result in a significant FD demand, where its magnitude could be interpreted as requiring a large stick input.
Furthermore, consider how the FD is used; is it normal to follow a combined path, pitch and roll together, or alternatively separate the axis, nulling roll independently of pitch, (which FD format did this aircraft have - single or split cue?).
If a sequential axis response was made then a FD roll demand at a high bank angle could be interpreted as having a significant pitch component; obviously this is speculative.
Another view might also conclude that the stall was induced by the FD and SOP.
Thus there may be greater safety value in considering how crews fly the FD in normal operation and how SOPs are interpreted –
always follow the FD ??! .
Another ‘SOP mantra’ is ‘
fly the aircraft’, but what does ‘fly’ mean.
A better approach is Aviate, Navigate, Communicate, … which should be more likely to generate the question ‘what does ‘Aviate’ mean'. Many posts focus on stick and rudder skills (fly) overlooking the preceding need to understand the situation – 90% of human thought involves understanding; when and where are the skills of understanding taught.
Some recent views of awareness suggest that we should be teaching the identification of situations where SOPs should not be followed (how to identify them), opposed to always follow SOPs.
ExV238, re
‘fail to recognise …’, see
Errors in Aviation Decision Making: Bad Decisions or Bad Luck?
The decison to pull CBs?
Peter H, for info,
http://xstar.ihmc.us/research/projects/EssaysOnHCC/
See Sensemaking (2), Janus principle (training), boiled frog (procedural drift)