Charter operator OzJet wants to apply for an international airline licence and increase services to Bali.

The Melbourne-based company, which unsuccessfully tried to launch a business-class airline in 2005, has four older Boeing 737-200s based in Australia.

It has been operating a mixture of charter and regular public transport flights to destinations such as Norfolk Island, Papua New Guinea and Derby in Western Australia.

It began flying twice-weekly services between Perth and Denpasar in September under a commercial agreement with IndoJet Asia, and has applied to the International Air Services Commission for an extra 306 seats per week on the route.

OzJet said it wanted to apply for an international licence to operate the services to international airline standards.

"OzJet and IndoJet Asia wish to provide and improve accessibility to Bali, one of Australia's favourite international holiday destinations, by providing seat capacity combined with accommodation in the form of packaged holidays to the broad consumer market in Western Australia," the application said.

"Equally, the initiative serves to also promote and increase Australian inbound tourism."

The application comes as OzJet is under scrutiny by air safety experts after two of its planes were involved in incidents within three days.

The Australian Transport Safety Bureau is investigating an incident on December 29, 2007, in which a wing component failure saw passengers ordered to don life jackets and prepare for a potential ocean ditching.

The incident happened as weather forced the plane from Brisbane to divert from Norfolk Island to Noumea.

The ATSB is looking at information from the aircraft's flight data recorder as well as broken components in the leading edge slat of the right wing.

The second incident, on December 31, 2007, involved a broken stabilising panel called a trim tab on a flight from Port Moresby to Brisbane.

The plane returned to Port Moresby after it developed severe vibrations.

In both cases the planes landed safely and passengers were accommodated on other flights.