HazelNuts39
It is the fuselage violently veering to the right which 'twists' the frames.
Les déformations des cadres montrent qu’ils se sont rompus dans un mouvement vers l’avant avec une légère composante en torsion vers la gauche.
( From the 1st interim report)
One of the aspects of your argument that bug me is the association of a *slight torsion component to the left* with a violent *veering to the right*
The second interim report explains the stresses involved thus :
"The vertical stabiliser’s side panels did not show signs of compression damage.
The breaks seen at the level of the lateral load pick-up rods were the result of the backwards movement of the attachments and centre and aft frames. The observations made on the vertical stabiliser are not consistent with a failure due to lateral loads in flight.
The observations made on the debris (toilet doors, partitions, galleys, cabin
crew rest module, spoiler, aileron, vertical stabiliser) evidenced high rates of
compression resulting from a high rate of descent at the time of impact with
the water.
This high rate of compression can be seen all over the aircraft and symmetrically on the right- and left-hand sides.
High levels of loading would be required to cause the damage observed forward of the vertical stabiliser (compression failure of the forward attachment).
These observations are not compatible with a separation of the aft part of the fuselage in flight.
The damage found at the root of the vertical stabiliser was more or less
symmetrical, as were the deformations due to the high rate of compression
observed on the various parts of the aircraft. This left-right symmetry means
that the aircraft had low bank and little sideslip on impact.(which shoots down the sideslip theory, too )
The deformations of the fuselage frames at the root of the vertical stabiliser
were not consistent with an aircraft nose-down attitude at the moment of
impact".
All the above makes me think that
the slight torsion to the left component of the stress forces on the frame
came from a yawing moment to the left, therefore a slight left wing low attitude at impact.