double-oscar, #4005,
‘… they had a stall warning on lift-off. There is guidance for this in the QRH and the Flight Crew Training Manual which wasn’t followed.‘
In addition to stall warning, the crews also had higher stick force (feel shift), airspeed and altitude disagree alerts, ambiguous speed indications; surprise.
Now where in the manual is this combination considered, and belatedly in the FAA AD, how is the description and interaction of these placed in appropriate context.
How should the possibility that the Manufacturer or the Regulator not following their procedures be framed - context, for including a procedure for a situation which was overlooked or not even conceived?
The Lion and Ethiopian crews are the most experienced in our industry in those specific conditions; unfortunately there are unable to relate their experiences for us to learn from. Thus it is everyone’s responsibility to learn from what is known of past events, but not to identify the similarities with (our) current thoughts, or fit understanding to hindsight; instead we all have identify new issue particularly those hidden or already forgotten.