Casa needs a royal commission. End of story.
Awi,s with vicious vindictive actions need to be placed on notice that they may be sued and sacked for their actions.
Malicious grounding of aircraft , workshop approvals for minute infractions should not be accepted from these public servants.
A full independent complaints department not in any way part of casa is required.
They take you to court loose but still win. As you then have no chance of redeeming your legal costs.