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Beechcraft T-6 Texan II
The Beechcraft T-6 Texan II is a single-engine turboprop aircraft built by the Raytheon Aircraft Company (which became Hawker Beechcraft and is now Beechcraft Corporation). Based on the Pilatus PC-9, the T-6 has replaced the Air Force's Cessna T-37B Tweet and the Navy's T-34C Turbo Mentor. The T-6A is used by the United States Air Force for basic pilot training and Combat Systems Officer (CSO) training and by the United States Navy and United States Marine Corps for Primary and Intermediate Naval Flight Officer (NFO) training. The T-6A is also used as a basic trainer by the Royal Canadian Air Force (CT-156 Harvard II), the Greek Air Force, the Israeli Air Force (''Efroni''), and the Iraqi Air Force. The T-6B is the primary trainer for U.S. Student Naval Aviators. The T-6C is used for training by the Royal Moroccan Air Force, the Royal New Zealand Air Force and the Mexican Air Force.
==Design and development==
The T-6 is a development of the Pilatus PC-9, modified significantly by Beechcraft in order to enter the Joint Primary Aircraft Training System (JPATS) competition in the 1990s. A similar arrangement between Pilatus and British Aerospace had also been in place for a Royal Air Force competition in the 1980s, although this competition selected the Short Tucano. The aircraft was designated under the 1962 United States Tri-Service aircraft designation system and named for the decades-earlier T-6 Texan.
The JPATS competition winning design was based on a commercial off the shelf Pilatus PC-9, with minor modifications. Additional requirements and conflicts between the Air Force and the Navy resulted in delays, cost increases (from initial estimates of $3.9 to roughly $6 million per aircraft) and a completely new aircraft that is 22% or 1,100 lbs heavier than the Pilatus.
On April 9, 2007 the U.S. Department of Defense released their Selected Acquisition Reports, which reported that the T-6 JPATS program was one of only eight programs cited for Congressional notification for 25–50% cost overrun over initial estimates, which is referred to as a "Nunn-McCurdy Breach" after the Nunn-McCurdy Amendment. It is unusual for a program so far into full rate production to experience significant enough cost overruns to trigger this Congressional notification.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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