DALLAS — Today, in 1964, the three-engined Boeing 727 entered service with launch customer Eastern Air Lines (EA), one of the "Big Four" domestic airlines created by the Spoils Conferences of 1930.

In the late 1950s, three major airlines — United Airlines, Eastern Air Lines ... Boeing produced the 727-200, which is 20 feet longer and can hold a few dozen more seats. The Advanced 727-200 ...