Originally Posted by Neptunus Rex
In a conventional low-wing monoplane, the centre of pressure (lift) is aft of the centre of gravity. The aircraft is kept in balance by a downward force on the tailplane. If the tailplane fails, the result is an instantaneous and massive nose-down pitch, which could result in further structural failure.
This observation fit very well with what could happen once the tail is separated. Until then, first impact was not too hard and structure's bits going loose would be only from the rear under belly but once the Mosque road would be crossed, with bump, and the tail separated, here came the major catastrophic part for the fuselage. Nose and wings would still have some height and everything would be projected down at high speed (even remaining thrust could contribute further). A major impact would follow, tearing everything appart from this point.
This explain why the cabin was so fragmented and nearly no big part of the fuselage survived (cockpit was nearly flatened). Also the state of the engine, fragments of the landing gear around this place and further (it was possibly still down but never touched ground). The surviving boy could have been ejected when the tail fall appart. He certainly was seated on the rear rows.
S~
Olivier