to 50 percent. Replacing the Kiowa with Apaches and UAVs in scout roles met 80 percent of requirements. In early 2014, Bell received a stop-work order for the Kiowa CASUP program. OH-58F Block II On 14 April 2011, Bell performed the successful first flight of the OH-58F Block II variant. It was Bell's entry in the Armed Aerial Scout (AAS) program. It built on the improvements of the F-model, adding features such as the Honeywell HTS900 turboshaft engine, the transmission and main rotors of the Bell 407, and the tail and tail rotor of the Bell 427. Bell started flight demonstrations in October 2012. Bell hoped for the Army to go with their service life extension models instead of the AAS program. The OH-58F is an "obsolescence upgrade", while the Block II was seen as the performance upgrade. This gave the Army financial flexibility via the option of upgrading the Kiowa to the OH-58F and later continuing to the Block II when there were sufficient funds. In late 2012, the Army recommended that the AAS program proceed. The Army ended the AAS program in late 2013. In light of sequestration budget cuts in 2013, it was decided that the $16 billion cost to buy new armed scout helicopters was too great. Others The OH-58X was a modification of the fourth development OH-58D (s/n 69-16322) with partial stealth features and a chin-mounted McDonnell-Douglas Electronics Systems turret as a night piloting system; including a Kodak FLIR system with a 30-degree field of view. Avionics systems were consolidated and moved to the nose, making room for a passenger seat in the rear. No aircraft were produced. Operators Current operators Austrian Air Force Croatian Air Force Dominican Air Force Hellenic Army Iraqi Army Royal Saudi Land Forces Republic of China Army Tunisian Air Force Turkish Army Former operators Australian Army Canadian Armed Forces United States Army Aircraft on display 68-16940 – International Airport in Palm Springs, California. Transformed into a sculpture. 69-16112 – Pima Air and Space Museum in Tucson, Arizona 69-16123 – Kansas Museum of Military History in Augusta, Kansas 69-16153 – MAPS Air Museum in North Canton, Ohio 69-16338 – Point Alpha Museum in Hesse, Germany 71-20475 – Veterans Memorial Museum, Huntsville, Alabama, United States 71-20869 – National Air Force Museum of Canada, Trenton, Ontario, Canada CH-136 71-20920 – Polish Aviation Museum, Kraków, Poland – CH-136 72-21256 – The Aviation Museum of