191Assaults on member of crew of aircraft

191 Assaults on member of crew of aircraft Any person who, while on board an aircraft, unlawfully assaults a member of the crew of the aircraft or threatens such a member with any violence, injury or detriment of any kind to be caused to him, or any other person on the aircraft, by the offender or by any other person with the intention of affecting the performance by the member of his functions or duties in connection with the operation of the aircraft or with the intention of lessening his ability to perform those functions or duties, is guilty of an offence and is liable to