Takes place between the time any passenger boards the aircraft with the intention of flight until such time as all such passengers have disembarked where a person is fatally or seriously injured

Takes place between the time any person boards the aircraft with the intention of flight until such time as it stops engines where a person is fatally or seriously injured

Takes place between the time aircraft is in flight until such time as it lands where a person is fatally or seriously injured

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