Minor damage to the laquer can pass the visual inspection which is the first part of a hydro test
This is a large break and goes down to the fibre, so I would expect a tester to fail that, but they may be happy with it, mark it and possibly seal the edges
Like an mot the hydro test confirms the condition on a specific date, you ought to regularly check the condition prior to use
If I saw the damage when date checking I would not be happy with allowing it to be filled
You can submit it for a hydro test, and assuming it passes visual and hydro testing get the damage marked
I would say to no longer use it - do you know the circumstances of the damage?
