If CASA had any balls, they would summons BB and question his suitability to hold any accountable position.
As for the good Senator, why doen't he seek to have him charged with contempr of the Senate, there is enough evidence.
Niether of the above will happen.
Sadly we will have a Royal Commision one day and it will find that we have never acted on known defects in our industry. The Politicians will sack the head of CASA, and express horror at not having been informed of the sorry state of the industry.
Any life will go on because this is just a game of buck passing and not being in the firing line when sh!t happens.