The shots of the bulk of sparks looks like it was before the engine was actually shut down. There is another shot (it appears to be a bit out of sequence) where the sparking has decreased significantly to almost nothing.
Given that we weren't there and don't know what state the engine was in when the fuel dumping actually occurred it's a bit premature to suggest that the decision to dump fuel may have been incorrect or not have considered the sparks and other things.
From what I recall of the engine/ dump geometery I don't think it'd be much of an issue.
Last edited by Keg; 3rd Sep 2010 at 05:13.