According to VIC Law for the charge of Threats to safety of aircraft,

Crimes Act 1958 - SECT 246E

Threats to safety of aircraft

246E. Threats to safety of aircraft

Any person who threatens, states that it is his intention, or makes a statement from which it could reasonably be inferred that it is his intention to destroy damage or endanger the safety of an aircraft or to kill or injure all or any of the persons on board an aircraft shall be guilty of an indictable offence and liable to level 6 imprisonment (5 years maximum).

According to VIC Law for the charge of Threats to safety of aircraft,
5 years

1.  that the accused either:

(i) made a threat; or

(ii) made a statement as to his intention;

(iii) made a statement from which it could be reasonably inferred;

2.  that it was his intention to either:

(i) destroy damage or endanger the safety of an aircraft; or

(ii) kill or injure all or any of the persons on board an aircraft.

1. Factual dispute: Inference not supported by the alleged statement

2. Duress

County Court