Air Education and Training Command nailed down its broad needs for the T-X trainer aircraft to replace the T-38, said Brig. Gen. Dawn M. Dunlop, head of AETC plans, programs, and requirements. The Air Force needs 350 T-Xs, with initial operational capability in 2023, to replace 421 T-38s, Dunlop told Air Force Magazine. The T-38 fleet has received a number of service life extension program modifications over its 54-year life and will be phased out between 2023 and 2029, but if there is a delay to T-X, "we would have to do additional [service life extension programs] on the T-38." The T-X is to finish delivery in 2031. The Air Force needs a new jet trainer, Dunlop stated, because "12 of the 18 tasks" that pilots must learn for advanced fast-jet training "can't be [accomplished] by the T-38."
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机译：布里格说，空中教育与训练司令部确定了其对T-X教练机替代T-38的广泛需求。 AETC计划，计划和要求负责人Dawn M. Dunlop将军。邓禄普告诉《空军杂志》，空军需要350架T-X，到2023年具备初始作战能力，以取代421架T-38。 T-38机队在其54年的使用寿命中已收到许多使用寿命延长计划的修改，并将在2023年至2029年之间逐步淘汰，但是如果TX出现延误，“我们将不得不延长[使用寿命扩展程序]。” TX将于2031年完成交付。邓洛普说，空军需要一架新的喷气教练机，因为T不能“完成飞行员必须进行的18项高级任务中必须学习的18项任务中的12项” -38。”
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