**Appendix B**

Definitions of 'Accident', 'Serious Incident', and 'Incident'

For the purpose of this study, the following definitions which were extracted from ICAO Annex 13 apply.

"Accident. An occurrence associated with the operation of an aircraft which, in the case of a manned aircraft, takes place between the time any person boards the aircraft with the intention of flight until such time as all such persons have disembarked, or in the case of an unmanned aircraft, takes place between the time the aircraft is ready to move with the purpose of flight until such time as it comes to rest at the end of the flight and the primary propulsion system is shut down, in which:

	- • being in the aircraft, or
	- • direct contact with any part of the aircraft, including parts which have become detached from the aircraft, or
	- • direct exposure to jet blast, except when the injuries are from natural causes, self-inflicted or inflicted by other persons, or when the injuries are to stowaways hiding outside the areas normally available to the passengers and crew; or
	- • adversely a ffects the structural strength, performance or flight characteristics of the aircraft, and
	- • would normally require major repair or replacement of the a ffected component, except for engine failure or damage, when the damage is limited to a single engine (including its cowlings or accessories), to propellers, wing tips, antennas, probes, vanes, tires, brakes, wheels, fairings, panels, landing gear doors, windscreens, the aircraft skin (such as small dents or puncture holes), or for minor damages to main rotor blades, tail rotor blades, landing gear, and those resulting from hail or bird strike (including holes in the radome); or

Note 1. For statistical uniformity only, an injury resulting in death within thirty days of the date of the accident is classified, by ICAO, as a fatal injury.

Note 2. An aircraft is considered to be missing when the o fficial search has been terminated and the wreckage has not been located.

Note 3. The type of unmanned aircraft system to be investigated is addressed in Annex 13 Section 5.1. Note 4. Guidance for the determination of aircraft damage can be found in Attachment E.

Serious incident. An incident involving circumstances indicating that there was a high probability of an accident and associated with the operation of an aircraft which, in the case of a manned aircraft, takes place between the time any person boards the aircraft with the intention of flight until such time

as all such persons have disembarked, or in the case of an unmanned aircraft, takes place between the time the aircraft is ready to move with the purpose of flight until such time as it comes to rest at the end of the flight and the primary propulsion system is shut down.

