Plumber to be grilled over hijack scare

Indonesian police are preparing to question a Queensland plumber who is in custody after allegedly sparking a hijacking scare aboard a Bali-bound flight.

Matt Christopher Lockley, 28, was detained by cabin crew on a Virgin Australia flight from Brisbane to Denpasar on Friday, after banging on the cockpit door.

Authorities at Denpasar's airport say they received notice of a "hijacking" from the plane and police and air force officers were waiting when it landed.

When they got on board the Boeing 737-300, Lockley was already detained at the rear of the aircraft and didn't put up a fight.

Cabin crew reported he was intoxicated, aggressive and paranoid, but police wouldn't confirm his intoxication until after a medical examination.

Bali Police Chief Inspector General Albertus Julius Benny Mokalu said Lockley was too "confused" to be questioned on Friday but would undergo drug and alcohol testing.

Authorities are also investigating the hijack signal, which triggered the closure of the busy tourist airport for about 30 minutes.

Virgin Australia's Bali airport manager, Heru Sudjatmiko, said reports of a hijacking were a "miscommunication".

The airline says at no time was the aircraft's safety in question, with its 137 passengers and seven crew all disembarking safely.