Douglas DC-8-70

The Douglas DC-8-70 series represents a re-engining program conducted in the 1980s to modernize DC-8-60 aircraft with fuel-efficient CFM International CFM56-2 turbofan engines. This conversion program, offered by Cammacorp (later acquired by Pemco), replaced the original Pratt & Whitney JT3D engines with modern high-bypass CFM56 engines producing 97.9 kN (22,000 lbf) thrust each. The re-engining dramatically improved fuel efficiency by approximately 25%, reduced noise levels to meet stricter regulations, and extended the aircraft's operational life. Three variants mirrored the -60 series: DC-8-71 (Series 61 airframe), DC-8-72 (Series 62 airframe), and DC-8-73 (Series 63 airframe). The program converted 110 aircraft between 1981 and 1988. While passenger range decreased slightly to 8,949 km (4,830 NM) due to the heavier engines, the operational economics made DC-8-70s competitive well into the 1990s. Many DC-8-70s continue operating as freighters today, benefiting from modern engines and proven reliability.