Wednesday 19 October 1994. Boeing 747-300 VH-INH landed at Sydney without the nose wheel extended. Approximately one hour after departure the crew shut down the number one engine because of an oil leak. They returned the aircraft to Sydney where the approach proceeded normally until the landing gear was selected. With selection of the landing gear and selection of the flap beyond a setting of flaps 20, the landing gear warning horn began to sound because the nose landing gear... ha..