<text id=t3700003><title>Cessna—T-37 Tweet: USAF Variants and Serials</title>
<history>US Air Force: Aircraft</history>
<article><hdr>Cessna—T-37 Tweet: USAF Variants and Serials</hdr><body>
<list style=aflst>
<item><hi format=bold>XT-37:</hi> The three prototype aircraft were designated XT-37 to indicate the experimental nature of their evaluation for the basic training role.
<item>· 54-0716 to 54-0718
<item><hi format=bold>T-37A:</hi> Five hundred and thirty-four production T-37As were ordered between 1954 and 1959, with the majority being upgraded to T-37B standard subsequently. Thirty-nine early production T-37As were converted to A-37A standard as proof of concept.
<item>· 54-2729 to 54-2739; 55-2972; 55-4302 to 55-4321; 56-3464 to 56-3590; 57-2230 to 57-2352; 58-1861 to 58-1977; 59-0256 to 59-0390
<item><hi format=bold>T-37B:</hi> The T-37B was a development of the T-37A with more powerful engines and improved radio and navigation equipment. Four hundred and forty-nine were obtained between 1959 and 1968.
<item>· 59-0241 to 59-0255; 60-0071 to 60-0200; 61-2494 to 61-2508; 61-2915 to 61-2919; 62-5952 to 62-5956; 64-13409 to 64-13470; 65-10823 to 65-10826; 66-7960 to 66-8006; 67-14730 to 67-14768; 67-22240 to 67-22262; 68-7981 to 68-8084
<item><hi format=bold>(Note:</hi> some aircraft were exported to Chile, Colombia, Greece, Jordan, Pakistan, Peru, South Vietnam, Thailand and Turkey.<hi format=bold>)</hi>
<item><hi format=bold>GT-37A:</hi> Four early production T-37As have been reassigned to the ground instruction role.
