Machinbird,
Looks like they began to recover coming through 20,000 ft only to enter a secondary stall.
We are missing the AOA parameter graph, in order to know if there was a stall, a spin or a spiral dive. It looks they never recover fist time though
Also the interim report is missing the rudder input...
It is interesting to know if they tried to stop the
5 deg/second rotation, before pulling - see pitch graph vs. magnetic heading graph - in 18 sec from 180 to 90
1.11.2.1 Parameter decoding
The data contained in the FDR raw file was decoded using the documentation provided by
the aeroplane operator and manufacturer. The set of recorded parameters could be decoded
and used, except for the following parameters:
Angle of attack;
Control column position;
Control wheel position (LH/RH) (lateral position of the control column);
Rudder pedal position.
The angle of attack decoding function as specified in the documents provided by the operator
and the manufacturer was not valid. Further work is being carried out with the manufacturer
in order to determine and validate the conversion function.
Control wheel and rudder pedal positions are additional parameters that were not recorded
when the aeroplane was delivered.