Also, that aircraft hit the water intact - it was the damage to avionics and flight control connections that proved insurmountable.
It's been a long time but I believe the TSB report also stated that there was a strong likelihood that the loss of control may have been due to crew incapacitation because they were exposed to extreme heat and noxious fumes. Cockpit ceiling panels were exposed to heat in excess of 1400 degrees C and there was evidence of molten metal falling from those panels.