Restoration of Performance Models 727, 737, and 747

Existing fleets of jet transports, such as the 727, 737 and 747 have useful lives which will extend into the 1990s. Because of this longevity and the impact of escalating fuel prices, improvements in the airplanes’ operating economics are imperative. Studies have shown a number of changes to be cost effective. Among those being implemented are: improved flight operations, weight reductions, drag reduction packages, more fuel-efficient engines, and new flight management systems.