N631US Boeing 747-251B Northwest Airlines (NW / NWA) San Francisco - International (SFO / KSFO), USA - California Paul Hunter-Higgins - 24/05/1990
N631US Boeing 747-251B Northwest Airlines (NW / NWA) Los Angeles - International (LAX / KLAX), USA - California Christopher Terry - 23/09/1990
N631US Boeing 747-251B Northwest Airlines (NW / NWA) Hong Kong Kai-Tak (HKG / VHHH), Hong Kong Paul Finnigan - 06/1995
