Mr Skylark, I'm having "a bit of a go" trying to decipher exactly what your message is, other than Air Transat pilots are, on occasion, lucky.
Point 1. The leak was near the engine, not the wing.
Point 2. The Captain didn't think it was a random error message, he thought the computer was wrong (rightly or wrongly, his call)
Point 3. He didn't 'divert fuel', he crossfed, and therefore he had both engines 'feeding' from the 'good' side.
Point 4. What is your point with regards to stating that:
"it is naive to just look over an aircraft, say it's ok then send if off packing, epecially with a potentially leathal problem like this. If I were the brains behind the head, I would take the time to find out more about precisely what has happened. Otherwise you could be left with an accident waiting to happen."
Like I said, what is your point, and who implied whatever it is you're trying to say?
About the only thing that makes sense in your post is the last statement. Perhaps we've been into the grape?
Respectfully,
Jonny D