Notification of accident
3.  An accident shall be notified in accordance with regulation 4 if, between the time when any person boards an aircraft with the intention of flight and such time as all persons have disembarked therefrom —
(a)any person suffers death or serious injury while in the aircraft or by direct contact with any part of the aircraft, including parts which have become detached from the aircraft or by direct exposure to jet blast;
(b)the aircraft receives substantial damage; or
(c)the aircraft is missing or though located is completely inaccessible.