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An aviation accident is defined by the Convention on International Civil Aviation Annex 13 as an occurrence associated with the operation of an aircraft which takes place between the time any person boards the aircraft with the intention of flight until such time as all such persons have disembarked where a person is fatally or seriously injured the aircraft sustains damage or structural failure or the aircraft is missing or is completely inaccessible.The first fatal aviation accident occurred in a Wright Model A aircraft at Fort Myer Virginia USA on 17 September 1908 resulting in injury to the pilot Orville Wright and death of the passenger Signal Corps Lieutenant Thomas Selfridge.An aviation incident is defined as an occurrence other than an accident associated with the operation of an aircraft that affects or could affect the safety of operations.An accident in which the damage to the aircraft is such that it must be written off or in which the plane is destroyed is a hull loss accident.