If there are concerns from CASA about maintenance standards, then its either the fault of a major 3rd party provider in this country (which I'm sure if it were at fault it would be in trouble, not Tiger), or its the department which is controlling/scheduling what maintenance is to be done within.
I wouldn't be too sure about that......You might find that (figuratively speaking) CASA don't care who does the maintenance, they just want all the boxes ticked.
I doubt that Tigger would get away with saying "I paid Winnie and Piglet to do all my (Boeing required) maintenance, look, here's the receipts so it's all good".
While CASA wouldn't be too happy with Winnie, Piglet and all the other animals in the 40 acre wood, I suspect that the biggest huffin' and puffin' would still be directed at Tigger ......
ST