and getting the fuel burning you have to sustain the engines so it is a tricky maneuver. >> the singapore airlines said one engine regained power while pilots worked on the second. >> it is something they are trained to do and in all cases on all plane trz is a -- there is a point at which you don't try any more diving restarts just look for a place to set it down. >> this is the latest of several incidents involving asian airlines. flight 235 crashed into a river in thigh won. in december flight 8501 an airbus crashed into the java sea minutes after the pilot asked for clearance to climb in altitude to avoid bad weather.