Flood Flow?
I seemed to recall that the Valiant had a system called Flood Flow. In the event of loss of cabin pressure flood flow would kick in to provide ram air to the cabin. I believe this was intended to increase cabin air pressure.
When Flood Flow kicked in a circular panel, about the size of a dustbin lid, was ejected from under the wing.
Once during a prod from a Javelin Flood Flow kicked in uncommanded firing the dustbin lid at the Javelin. I believe it was disabled thereafter.
Any Valiant drivers able to confirm or deny the story?