term:

Aircraft Piracy

aircraft piracy n

1 : the hijacking of an aircraft esp. in flight
;specif
: the act of seizing control of an aircraft by force, violence, threat, or intimidation with wrongful intent
2 : the felony of hijacking or seizing control of an aircraft called also air piracy

Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.