After Japanese airlines requested an aircraft to fly routes between major cities in Japan, Boeing produced the -100SR. This model flies shorter distances, but is able to carry more passengers. The first -100SR started flying with Japan Air Lines (JAL) on October 7, 1973. The -100SR had four General Electric CF6-45A2 or Pratt & Whitney JT9D-7A engines. A total of 7 -100SR were produced.