RIYADH, 22 February - A Saudi Arabian Airlines Boeing 747 made an emergency landing at King Khaled International Airport here 45 minutes after take-off, Al-Riyadh daily reported yesterday. Flight Capt. Fawaz Flimban said he was forced to ground the plane bound for Jeddah with 494 people aboard when use of a cell phone by one of the passengers interfered with the navigation system.