and in all cases on all planes, there is a point at which the manuals say don't try any more diving restarts. just look for a place to put it down and set it down. >> this is the latest of several incidents involving asian airlines. flight 235 crashed into a river in taiwan. in december, air asia flight 8501 and airbus 320, disappeared from radar and crashed into the java sea minutes after the pilot asked for clearance to climb in altitude to avoid bad weather. and malaysia airlines flight 370 from kuala lumpur from beijing disappeared without a trace more than a year ago. but as for singapore airlines, its safety record is one to brag about. this year, it was rated one of the top ten safest airlines.