Straight from the source is not a rumour then. It is fact.
If it was a rumour, then you would have been the one who was able to confirm it.
Once again, there is a big difference between CASA grounding an aircraft (a massive and damaging news story)and an operator doing such. Also what is clearly stated is that, if Jet* did not inform CASA of the issue, then CASA probably would be none the wiser until the next audit.
As far a CASA monitoring the situation, I think you are trying to draw a long bow keeping CASA in a story, they originally had nothing to do with.
My foot is still on the ground.