I have always had a fascination with this subject and have read official report of many aircraft accidents. The one accident that keeps circulating through my head set is the Air New Zealand DC-10 sightseeing flight to Antarctica and crash on Mount Erebus. An accident that had its genesis seventeen months before the accident when ANZ navigation section computerized flight coordinates and one wrong key stroke went unnoticed until a week or so before the accident. The coordinates were changed just hours before the flight left Auckland , but what was believed to be a three mile change was in reality twenty seven miles. If your interest has brought you to this post, you might find the report of the Royal Commission inquiry into this accident compelling reading. Here is an appetizer. Royal Commissioner Peter Mahon described Air New Zealand executives' attempt to blame the flight crew for the accident,"an orchestrated litany of lies."