Deliveries of the MD-11, a wide-cabin trijet, began in 1991 and ended in 2001. The MD-11 is 18.6 feet longer than the DC-10 trijet, from which it was derived, and carries about 50 more passengers. It was produced in Long Beach, Calif. A worldwide network of subcontractors and suppliers supported the assembly line. The MD-11 was available in four models: passenger, all freighter, convertible freighter and "combi," where passengers and freight were carried on the main deck and additional freight below the deck. An extended-range (ER) feature was available on all versions.