Randolph AFB, TX, 14 Dec 09: Joe Gonzalez and David Delgado engine maintenance specialists with the 12th Flying Training Wing Maintenance Support Unit from the 12th Flying Training Wing Maintenance Support Unit tightens a prop flange mounting bolt during T-6 Texan II, PT6A-68 engine upgrades, which increase prop shaft reliability, at Randolph Air Force Base, Texas on December 14. Steve Thurow

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Keywords: .., aetc, air, base, defense, engines, force, jet, military, randolph, tx, united, usa, war