"Our maintainance department could not find a schematic showing a fuel dump system. He did mention that the A300-600 that we fly has a fuel tank in the horizontal stab.
Also, some of the film that I've seen that shows a large piece of wreckage looks very much like the tail of the airplane There is a cut-out that appears to me to be for the stab. The stab cut-out and the shereical rear pressure bulkhead is what identifies that hunk of metal. I would assume from that that the CVR and FDR will be in good shape as that area of the airplane did not appear to have been subjected to high stress/heat."
FWIW.
Under emergency conditions also, fuel dump [to reach more or less Max Landing Weight fuel levels] needs to be closely monitored. This can normally be achieved electrically by the FMS software, but it fails once electrics are monitored off [no power to jettison circuit’s bus, and possibly also to all fuel gauges].
A mechanical device [auto-closing, float-operated dump valve] needs to be installed to stop unattended dumping once it reaches specific minimum fuel level. In some a/c it is easy to start jettison early in the checklist [then forget about it and perhaps the auto-shutoff will be electrically disabled by completing the checklist – leading to fuel shortage]. This may not have been a factor with SR111 but it is apparent that Smk/Elec/Air Switch position 2/3 OFF disables the Fuel Dump (auto low-level shut-off).