Feb 22 1968

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SST prototype construction would be delayed one year because of design changes "which would result in significant improvements in the production airplane," Boeing Co. President William M. Allen an­nounced. Detailed plans of recommended changes were being prepared for FAA approval. Although present design could result in airworthy flight-test aircraft, FAA and airline reviewers had concluded that proto­type should have more substantial range and payload "to assure it is a sound foundation for an economically successful commercial aircraft." First flights now would be in 1972. (Boeing Release; W Post, 2/23/68, A3; WSJ, 2/23/68, 4)

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