Boeing 707 ushering in the Jet Age. It established Boeing as one of the largest manufacturers of passenger aircraft, and led to the later series of airliners with "7x7" designations. The later 720, 727, 737, and 757 share elements of the 707's fuselage design. The 707 was developed from the Boeing 367-80, a prototype jet first flown in 1954. A larger fuselage cross-section and other modifications resulted in the initial-production 707-120, powered by Pratt & Whitney JT3C turbojet engines, which first flew on December 20, 1957. Pan American World Airways began regular 707 service on October 26, 1958. Later derivatives included the
1977 Dan-Air Boeing 707 crash Airport to Athens (Hellinikon Airport), which was uneventful; from Athens it then proceeded to Nairobi (Jomo Kenyatta International Airport). Departure from Nairobi for Lusaka on the final leg occurred as planned at 07:17, 14 May. The 707 cruised at flight level 310 for about two hours, after which it was cleared for descent to flight level 110. Flight level 110 was reached at approximately 09:23, and clearance was granted to begin descent towards a target of flight level 70. Just before 09:30, clearance to descend to was granted, and moments later the plane was cleared to make a visual approach