In 2025, the aviation industry commemorates the 55th anniversary of the Boeing 747, an aircraft that has significantly impacted long-haul travel. Despite the cessation of production for its latest variant, the Boeing 747-8, in 2023, some airlines continue to operate earlier models like the Boeing 747-400. Among these is Kalitta Air's N740CK, recognized as the oldest Boeing 747-400 still flying.
Kalitta Air's N740CK remains operational in 2025, serving as a cargo aircraft despite its age. Originally delivered in October 1989 to Malaysia Airlines as a passenger plane (9M-MHM), it was converted into a freighter by Boeing in 2003 and acquired by Kalitta Air in 2008. Since then, it has been part of Kalitta's fleet dedicated to air freight and operates under DHL Aviation service.
The transformation from a passenger plane to a freighter is common among older Boeing 747s. As airlines transitioned to more fuel-efficient twin-engine aircraft like the Boeing 777 and Airbus A330, many retired their quadjets or repurposed them for cargo use. The conversion process involves significant modifications such as reinforced floors and advanced loading systems.