Serious security deficiencies have been uncovered at Townsville Airport, with fake bombs passing through screening undetected.
In April this year aviation inspectors, with Home Affairs, conducted what is known as red teaming tests.
Two fake improvised explosive devices passed through without being spotted by staff. Last month another device slipped through without anyone noticing.
Terrorism expert Neil Fergus says the breaches are a serious concern.
“It’s a key regional airport and anything that indicates an IED can get through the aviation logistics chain should cause us great concern.”