Originally Posted by
henra
Indeed the position is quite close to each other.
... Also that apparently no one checked position of the levers even when after applying power nothing happened. Normally even peripheral vision should have been enough to ring a bell. And all this in bright daylight. ... But from the basic facts we know chances are still very high that exactly this happened.
Even more puzzling:
10:56:32: The PF then called for “FLAPS 30” at 10:56:32, and the PM replied, “Flaps 30 and descending”. The ...(FDR) data did not record any flap surface movement at that time. Instead, the propeller rotation speed (Np) of both engines decreased simultaneously to less than 25%1 and the torque (Tq) started decreasing to 0%, which is consistent with both propellers going into the feathered condition2. ..
10:56:54, another click was heard, followed by the flaps surface movement to the 30 degrees position...
That sounds to me like someone noticed the mistake after 20 s and pulled the flap levers to 30. Clandestine correction of error with no comment on the CVR and no check / correction of the condition levers?