Jetstar is facing legal action in Australia over claims it unfairly treated trainee pilots from New Zealand.
The Fair Work Ombudsman lodged the claims in the federal court on Monday, claiming the Qantas subsidiary hired cadets to work in New Zealand, but did not pay them superannuation and charged them for training in Australia.
Six pilots were recruited between October 2010 and January 2011 and given six months training in Australia.
The Ombudsman claims the pilots were asked to repay the cost of their training despite this being prohibited under Australian law.
Papers lodged with the court says the trainees repaid $17,500 before the practice ceased and the money was returned to them in November 2011.
Jetstar says it will defend the charges.