A compressor surge/ stall are usually due to something going wrong (or about to go wrong) in the compressor section or air intake of the aircraft and I'm willing to bet its maintenance related. As far as the V-22, it hasn't been cancelled because when it becomes fully operational it will be a breakthrough in combat mobility. It did had its share of teething failures but if you look into those failures it was due to the operators and the push to get the thing into squadron service. I've been to the factory, seen the machine up close and became a believer in its ability, the only mistake made was to let the Marines take the lead in its deployment.