Super VC-10
Apparently the PCAA has released an initial report.
It would seem that an uncontained engine failure caused significant damage to the wing, rendering the aircraft uncontrollable.
I view the above as highly suspect and/or premature. There is no direct quoting of the authorities as to cause and result. Just the normal leap of reporters.
from the suspect article referenced:
However, an aircraft will fall freely if there is structural damage as hampered aerodynamics does not allow it to glide with gradual descent. There is a possibility then that the failed engine had exploded and damaged the wing attached to it.