An aviation accident is an event during aircraft operation that causes serious injury, death, or destruction. An aviation incident is any operating event that compromises safety but does not progress to an aviation accident. Preventing accidents and incidents is the main goal of aviation safety.

The first fatal aviation accident occurred on 10th May 1785, when a hot air balloon crashed in the town of Tullamore, Co. Offaly, Ireland. The town was seriously damaged from the resultant fire that burned down over 130 homes. The first involving a powered aircraft was the crash of a Wright Model A aircraft at Fort Myer, Virginia, in the United States on September 17, 1908, injuring its co-inventor and pilot, Orville Wright, and killing the passenger, Signal Corps lieutenant Thomas Selfridge.

Definitions

The Convention on International Civil Aviation Annex 13 formally defines an aviation accident as an occurrence associated with the operation of an aircraft, which takes place from the time any person boards the aircraft with the intention of flight until all such persons have disembarked, and in which (a) a person is fatally or seriously injured, (b) the aircraft sustains significant damage or structural failure, or (c) the aircraft goes missing or becomes completely inaccessible. Annex 13 defines an aviation incident as an occurrence, other than an accident, associated with the operation of an aircraft that affects or could affect the safety of operation.

A hull loss occurs if an aircraft is damaged beyond repair, is lost, or becomes completely inaccessible.