The acceptable rates for failures is not my issue Oscar. I dont have access to all the data that the regulator does, I am not an engineer either. I dont manufacture aeroplanes or their engines. So what I "find" acceptable is of little use.
Logically I would want ZERO failures per 10000 hours, or 10 billion hours. What I find acceptable is not the issue.
What is the issue NOW, is the people who DO have access to the numbers. The people that DO have acceptable and un acceptable levels, legislate FOR me. They give ME direction in the form of approvals and rule frameworks for me to operate under.
When the regulator FORCES me to make my student sign a waiver with wording like :
‘I ACKNOWLEDGE THAT CASA HAS IMPOSED LIMITATIONS ON THE AIRCRAFT TO PROTECT PERSONS ON THE GROUND NOT ASSOCIATED WITH THE OPERATON OF THE AIRCRAFT, UNINFORMED PASSENGERS AND TRAINEE PILOTS. THOSE LIMITATIONS ALSO HELP PASSENGERS AND TRAINEE PILOTS TO MAKE AN INFORMED DECISION ABOUT WHETHER TO ACCEPT THE RISK OF FLIGHTS IN THE AIRCRAFT.
I ACCEPT THE RISK OF BEING INJURED OR KILLED IN THE EVENT OF AN ENGINE MALFUNCTION DURING FLIGHT, NOTING THAT:
‘(A) THE AIRCRAFT MUST BE FLOWN AWAY FROM PEOPLE ON THE GROUND (AND BUILDINGS), EVEN IF THAT MEANS AN EMERGENCY LANDING AT A LOCATION THAT IS LESS SAFE FOR THAT PURPOSE; AND
‘(B) THE SAFETY OF AN EMERGENCY LANDING CANNOT BE GUARANTEED EVEN IF THERE IS A SUITABLE LANDING LOCATION.
‘I NOTE CASA’S ADVICE THAT I SHOULD NOT FLY IN THE AIRCRAFT IF I AM NOT PREPARED TO ACCEPT THE HEIGHTENED RISK INVOLVED.
The risk is cl;eraly highlighted. And its been done so BY THE REGULATOR. In the event something was to happen and a student was killed, the fact they had signed the above would not help me sleep, or to answer the question posed by the coronor.
"Mr Campbell, the risk was clearly highlighted, the regulator of your organisation TOLD you there was what they deem " an unacceptable risk" and yet YOU sent a student solo, who would ghave no doubt been acting on YOYR recommendation. The student could ONLY have agreed to fly the aircraft on YOUR recommendation. And there are OTHER options for you to send students solo in that the regulator does NOT find to pose an unacceptable risk.
This would be my advice to ALL CFI's who would consider sending a student solo in the aircraft.
The risk has NOT changed, but the consequence to US as instructors, and the RAA HAS CHANGED. And if thats not obvious to people, then I suggest they have good look at the wording of the waiver. And the spirit of the instrument.
Good luck fighting the relatives of the 15 years old girl who augers in.