Exfocx, I did the statistics on Angel Flight months ago and showed that the ATSB was talking BS. I used to do analysis work like this professionally for an airline, including setting up monitoring systems to pick trends, data that we shared with the regulator.
CASA is a regulator that thinks the aircraft knows when it is doing an Angel Flight and then, like the vicious creatures they are, decides to deliberately break or fail. That is why extra maintenance is needed for Angel Flight aircraft.
Aircraft also know when they are flying over water.....you can hear the engine note change; ta pocketa pocketa pocketa..........