another option
2ndgen,
If you decide to go ahead with your complaints you might also think about sending a copy of the info to Senator Nick Xenophon. He is apparently very concerned that people bringing genuine safety issues to the forefront do get immunity from CASA and do not get targeted by their employers.
He is a very influential person at the moment, and having him on side (or at least watching from the side) should prove very valuable.
I agree with most of the posts; when the rule breaking gets serious and risks lives, that's when you and your conscience have to make a decision. Looks like you are almost there at the moment.
Be aware that hearsay does not count as a legal argument; you will need to have documentary proof of a number of breaches of regs, and that the breaches are deliberate, not inadvertent.
Also, get some advice from aviation lawyers.
good luck
Seabreeze