MungoP. You raise an interesting point. Are you aware of, and can direct any of us to, ANY proper ICAO Annex 13 official investigation report into an airliner crash in Nigeria? Issuing them publicly is a requirement under ICAO (guys please don't list all the other non-observances) but try as I might I haven't been able to find a single one. Hard copies perhaps from Abuja or Lagos?