The term "irregular" or "nonscheduled" ("nonsked") airline is defined by the Civil Aeronautics Administration's (CAA) Manual 42, under "Irregular Air Carrier Certification and Operation Rules," as "any air carrier subject to the provisions of Part 291 of the Economic Regulations as heretofore or hereafter amended," which meant that such flights were exempt from compliance with various economic provisions applicable to certificated carriers authorized to engage in regularly scheduled operations.
The fairly easy access to surplus equipment facilitated the proliferation of nonsked companies, making necessary the intervention of the Civil Aeronautics Board (CAB), an agency created in 1938 to regulate the airline industry.
(17) He had travelled to Miami the day before to discuss possible new contracts with regular airliners at the time Governor Munoz Marin ordered the cancellation of all nonsked flights.
Of the few nonskeds operating on Puerto Rican soil, Westair Transport stood out as one of the more successful from the late 1940s.
Governor Luis Munoz Marin's quickly moved to shut down all nonskeds operating in the island, but that posed a serious problem: he had a contract requiring him to send 5,000 men to the Saginaw Valley by June 20.
The CAB had its own problems with Congress, as the latter threatened it with hearings on the Board's move to eliminate the nonskeds. When N1248N crashed, it received little attention from the regulatory agency.
An old friend of Munoz Marin's, he was among the first to appeal to the governor to lift the ban on the nonskeds.