Wondered that myself..pressurised it dropped it back on props , left it , repressurised it ....nothing . Not a drop.

It's one that has you questioning everything you know about hydraulics ! If it passes a 200% test , weight test and rupture valve test that is no different to a commissioning test here in the UK. I will put it back in service but it will bug the heck out of me for some time that I couldn't point at something and say ' that's it ' .