The Beechcraft T-6 Texan II is a single-engined 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-6A is used by the United States Air Force for basic pilot training and by the United States Navy for Primary and Intermediate Joint Naval Flight Officer (NFO) and Air Force Combat Systems Officer (CSO) training. It has replaced the Air Force's T-37B Tweet and is replacing the Navy's T-34C Turbo Mentor. The T-6A is also used as a basic trainer by the Royal Canadian Air Force (CT-156 Harvard II), the German Air Force, the Greek Air Force, theIsraeli Air Force (Efroni), and the Iraqi Air Force. The T-6C is used for training by the Royal Moroccan 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.[1] A similar arrangement between Pilatus andBritish 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.

Operational history
United States
The T-6A was introduced to Moody Air Force Base and Randolph Air Force Base in 2000-2001, and the Air Force awarded the full rate T-6 production contract in December 2001. Laughlin Air Force Base began flying the T-6 in 2003 where it is now the primary basic trainer, replacing the T-37. Vance Air Force Basecompleted transitioning from the T-37 to the T-6 in 2006. That year, Columbus Air Force Base began its transition, and retired its last T-37 in April 2008. The last active USAF T-37Bs were retired at Sheppard Air Force Base in the Summer of 2009.

The T-6A also replaced all T-34Cs with Training Air Wing SIX at Naval Air Station Pensacola in early 2005. T-6Bs have replaced all T-34Cs as the primary trainer with Training Air Wing FIVE at NAS Whiting Field. Training Air Wing FOUR at NAS Corpus Christi will continue to operate the T-34C as the primary trainer, with the arrival of their first T-6B in 2012.

The Texan failed to qualify for the Light Attack/Armed Reconnaissance program, because the USAF mailed the exclusion notice to the wrong address, leaving the company with no time to protest the decision. But the official mail failure gave Hawker-Beechcraft a further legal justification, as they had told the USAF they planned to file a legal challenge even before the official notice had been mailed and brought its considerable political influence to bear against the USAF decision against their candidate with one Kansas Congressman stating "It is simply wrong for the Obama administration to hire a Brazilian company to handle national security when we have a qualified and competent American company that can do the job."In 2013, Beechcraft was once again the loser.

Canada
The CT-156 Harvard II is a variant used for pilot instruction in the NATO Flying Training in Canada (NFTC)., located at 15 Wing, Moose Jaw, Saskatchewan. They are leased to the Royal Canadian Air Force by the program's administrator, Bombardier. NFTC's Harvard II aircraft are almost identical in cockpit layout and performance to the American JPATS Texan IIs. Within NFTC, students fly the Harvard II in Phase 2A and 2B of the training program, and some will go on to fly the CT-155 Hawk jet trainer also used by NFTC for Phase 3 (Moose Jaw) and Phase 4 Fighter Lead-In Training (4 Wing, Cold Lake, Alberta). The NFTC has 25 Harvard II aircraft owned and maintained by Bombardier.

Greece
The Hellenic Air Force operates 25 T-6A and 20 T-6A NTA aircraft.

Israel
On 9 June 2008, the Defense Security Cooperation Agency announced a possible FMS sale to Israel of 25 T-6As for the Israeli Air Force. In July 2009, Beechcraft delivered the first four of 20 T-6As under contract to the Israeli Air Force.

Iraq
On 16 December 2009: The first 4 of 15 T-6A aircraft are delivered to Iraq under a $210 million contract. No AT-6 aircraft were included as was previously reported. This equates to an average of $14 million per aircraft with support and training included. The first 8 aircraft, purchased by the Government of Iraq, will arrive at Tikrit by the end of January 2010. The last 7, purchased by the United States, are expected by the end of December 2010.

Mexico
On 9 January 2012 Hawker Beechcraft announced the sale of six T-6C+ aircraft to the Mexican Air Force to be delivered starting early 2012 and replacing the PC-7 trainers used by the FAM.

Morocco
In October 2009, Hawker Beechcraft announced the sale of 24 T-6Cs for the Royal Moroccan Air Force.

Variants
T-6A Texan II
Standard version for the USAF, USN, and Hellenic Air Force (25).

T-6A NTA Texan II
Armed version of the T-6A for the HAF (20). T-6A NTA has the capability to carry rocket pods, gun pods, external fuel tanks, and bombs.

T-6B Texan II
Upgraded version of the T-6A with a digital glass cockpit that includes a Head-Up Display (HUD), six multi-function displays (MFD) and Hands On Throttle And Stick (HOTAS).

AT-6B Texan II
Armed version of the T-6B for primary weapons training or light attack roles. It has the same digital cockpit, but upgraded to include datalink and integrated electro-optical sensors along with several weapons configurations. Engine power is increased to 1,600shp (1193 kW) with the Pratt & Whitney Canada PT6-68D engine, and the structure is reinforced.

T-6C Texan II
Upgraded version of the T-6B with wing hard points, and intelligence, surveillance, reconnaissance capabilities.

CT-156 Harvard II
Version of the T-6A for NTFC with the Canadian Forces. Nearly identical to standard USAF and USN in terms of avionics, cockpit layout, and performance