Customized Commercial Aviation
History:
The 737-400 was launched in 1985 as a stretched 737-300, primarily for use by charter airlines. Piedmont Airlines was the launch customer with an order for 25 aircraft in 1986.[88] The first 400 entered service in 1988 with Piedmont. The 486th and last delivery of the -400 occurred on February 25, 2000 to CSA Czech Airlines.
The 737-400F was not a model delivered by Boeing but a converted 737-400 to an all cargo aircraft. Alaska Airlines was the first to convert one of its -400s from regular service to an aircraft with the ability to handle 10 pallets.[89] The airline has also converted five more into fixed "combi" aircraft for half passenger and freight. These 737-400 Combi aircraft are now in service.
The 737-