V1 ....oops: I also work in this profession, as a long-haul captain with 30 years of flying experience. So I well know the need to study the causes of accidents. The fact is, no-one knows yet what happened to AF447, and until we do, none of us is in any position to come to any conclusions as to how to avoid a repeat, save to perhaps treat cb's with a bit more respect in case this was the prime cause.