Questions are raised over how a 17-year-old boy was able to evade security at Avalon Airport and board a flight with a loaded shotgun, in a breach one aviation security expert described as "unacceptable".

Home Affairs Minister Tony Burke has initiated the audit to determine what security upgrades are necessary to prevent such incidents after a teenage alleged gunman tried to board a Jetstar flight.

When the security crisis unfolded on Thursday afternoon, local police from Lara - nine kilometres away - were the ones that responded.

A lack of police presence at the airport meant officers had to race nine kilometres to arrest a teenager who claimed to be carrying a bomb on board a Jetstar flight.

A teenager who allegedly boarded a Jetstar flight armed with a shotgun has triggered a review of security at airports around Australia.

A teenager accused of attempting to hijack a Jetstar flight allegedly declared “I’ve got bombs in my bag” before he was tackled by passengers.

The Australian Federal Police have charged a man after he was allegedly caught with a knife at Sydney Airport after slashing the inside of a bus.

Regional airports across the country, including NSW, have been ordered to undertake rapid security assessments after a teenager allegedly tried to board a Jetstar flight near Melbourne while armed with a shotgun.

No South Australian regional airports are included in a major national security review of aviation sparked by a terror scare at Victoria’s Avalon Airport – despite some passengers boarding local planes without any screening.