Aviation workers were the subject of a Border Force investigation aiming to bust crimes within airport supply chains.
The probe discovered 70 staff at Melbourne Airport had breached security checks over the past 12 months, including some suspected of working within organised crime.
Airline crew engaged in illicit drug use as well as distributing illegal drugs in Australia, according to Border Force.
International airline crew members were also found to have hidden illegal cigarettes and tobacco products in false bottom suitcases.
This was allegedly done in an attempt to avoid paying significant amounts of customs tax.
Two international crew members were found to be under the influence of illegal substances while on duty which led to the cancellation of at least one visa to Australia.
Superintendent Kelly-Anne Parish said portable X-ray machines helped make the discoveries by scanning plane baggage storage, cargo holds and crew areas.
"(ABF) work closely with industry who have a vested interest in protecting and securing the aviation supply chain and are pivotal to safeguarding this environment," she said.
"Ensuring a safe environment from criminal exploitation of the aviation supply chain for the Australian community and those who work in the aviation industry is a top priority."
Superintendent Parish said the probe is ongoing and focusing on several people in aviation with links to trans-national organised crime groups.
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