Civil Aviation Regulations DEFINITIONS AND ABBREVIATIONS
 
Accelerate-stop distance available means the length of the take-off run available plus the length of any stopway
Accident means an occurrence that is associated with the operation of an aircraft and takes place between the time any person boards the aircraft with the intention of flight and such time as all such persons have disembarked and the engine or any propellers or rotors come to rest, being an occurrence in which— 
(1) a person is fatally or seriously injured as a result of— 
(i) being in the aircraft; or 
(ii) direct contact with any part of the aircraft, including any part that has become detached from the aircraft; or 
(iii) direct exposure to jet blast— 
except when the injuries are self-inflicted or inflicted by other persons, or when the injuries are to stowaways hiding outside the areas normally available to passengers and crew; or 
(2) the aircraft sustains damage or structural failure that— 
(i) adversely affects the structural strength, performance, or flight characteristics of the aircraft; and 
(ii) would normally require major repair or replacement of the affected component— 
except engine failure or damage that is limited to the engine, its cowlings, or accessories, or damage limited to propellers, wing tips, antennas, tyres, brakes, fairings, small dents, or puncture holes in the aircraft skin; or 
(3) the aircraft is missing or is completely inaccessible 
Accepted/Acceptable means not objected to by the Authority as suitable for the purpose intended.
Accredited medical conclusion means the conclusion reached by one or more medical experts acceptable to the Licensing Authority for the purposes of the case concerned, in consultation with flight operations or other experts as  necessary.
Adequate aerodrome, in relation to ETOPS, means an aerodrome that—