Även andra faktorer måste inkluderas. Exempelvis tekniska normer för säkerhet men också kvalificerad utbildning för piloter och alla andra som arbetar med flygplan. ###>We did so in order to make it clear that air safety is not the responsibility of air traffic control alone but that other basic aspects must also be taken into account, such as technical safety standards, together with high-level training of pilots and all the ancillary workers in the aircraft industry.