Try Googling your objectives and plenty will come up, below is one such example.
Occupational ruling summary 2002 - Airline employees
The reality here is the cost of your training is expensive and any opportunity to get one back from the government is worth the exercise. The trick here is to be able to interpret the legislation yourself and try for the deduction or get a tax expert to do this years tax for you and get a conclusive answer which is far safer if it proves wrong. Alternatively you can pick up the phone and anonomously explain your situation to the ATO and see what their thoughts are and if positive note the date, time and person spoken to.
For what it is worth had you been fulltime with this company as a pilot and they required a MECIR to further your employment your chances would be certainly good. The fact your were part time and in ground ops and did your training may lower your chances so I'd pass this one onto your tax agent and get a conclusive answer.