The aircraft were owned by The NSW Govt....but crewed and maintained by East-West Airlines, the pilots were selected because of their G.A. background and were required to do two years in the air ambulance before taking up an F-27 F/O position, I did just over three years before being released back into the airline, I must say it was the most satisfying job in my aviation career to date...all single pilot ops. at all hours, all weather, our only radar set disappeared with the loss of VH-AMS....We were fortunate to have a great Chief Pilot in the G/A operation, who ensured that airline standards of operation were maintained, even pilots with Queenair time like myself had to undergo 50 hours of training before doing a base check & route check prior to being released to the line..the safety record was very good, the only unfortunate event occured when a Flight Sister crossing a wet and windy Mascot Ramp at night with her head down walked into a running prop.