AS-211 Served as trainers with secondary combat capability with the Philippine Air Force and were nicknamed as "Warriors". Starting in 2005, these aircraft were upgraded by fitting the Norsight Optical Sight and AN/ARC-34s from retired F-5s. It is also equipped with a .50 caliber belly gun pod made by Aerotech. M-311 Modernized and uprated version announced by Aermacchi in 2004 (two prototypes built). Operators Military operators Haitian Air Force (HAF) – Four aircraft were delivered in June 1985, they were retired and put up for sale on 23 April 1990. Philippine Air Force (PAF) – 25 aircraft, including one partially completed airframe for spare parts and 15 assembled locally by Philippine Aerospace Development Corporation. Due to accidents, 13 remain in inventory, 5 in active service as of September 2013 (Tail numbers 001,002,021,801 and 802). Another aircraft with tail number 008 is planned to be overhauled and brought back to service in 2014. 105th Training Squadron "Blackjacks", 5th Fighter Wing 7th Tactical Fighter Squadron "Bulldogs" replaced by KAI FA-50PH Fighting Eagle 2015-2017 Republic of Singapore Air Force (RSAF) – total of 32 aircraft including 24 assembled locally by Singapore Aircraft Industries and two former Haitian aircraft were acquired as attrition replacements. The aircraft were based in, and flight training undertaken, in Australia. 130 Squadron, Republic of Singapore Air Force – 25 airframes in operational use (7 airframes were write-offs due to accidents). These were replaced by the Pilatus PC-21 from end 2008. After retirement, four were shipped back to Singapore being preserved for museum display and as educational/instructional airframes, while the remaining 21 airframes (including one airframe that had been used for spare parts) were sold off to International Air Parts (IAP) Group Australia Pty Ltd in 2009. 131 Sqn – disbanded in 1996, following the move of RSAF Flight Training School to RAAF Base Pearce in Bullsbrook, Western Australia, all remaining aircraft transferred to the former. Civilian operators 21 ex-RSAF S-211s were retired and sold to the IAP Group Australia in December 2009 (including a cannibalised airframe), fifteen have since been sold off and placed on the Australian civil registry. Two second-hand aircraft (ex-Haitian AF) are operated by private companies. Aviation Performance Solutions uses S211 SIAI-Marchettis at their headquarters in Mesa, Arizona. Accidents and incidents On 14 January 2002, Philippine Air Force S-211 #017 crashed into houses inside the National Food Authority compound in Brgy. M.S.Garcia, Cabanatuan City, Nueva Ecija,