In 2011 one aircraft crash landed in Afghanistan and was damaged beyond repair. 11 of AFSOC's C-145As were retired in 2015. In 2016, three were sent to Kenya, two to Costa Rica, two to Nepal, and two to Estonia. On 15 December 2022, the 711th Special Operations Squadron retired the C-145A from U.S. service. Variants Airframe variants PZL An-28 Original variant, built under Antonov licence, with PZL-10S (licensed TV-10B) engines. PZL M28 Skytruck Development variant with redesigned fuselage and wings, new Pratt & Whitney Canada engines, new (western) avionics, 5-blade rotors, and some other minor changes. PZL M28B Bryza Militarized variants used by Polish Air Force and Polish Navy, similar to Skytruck, but with PZL-10S engines. Uses partially retracting landing gear to avoid interfering with its radar. PZL M28+ Skytruck Plus Prototype of new lengthened variant with more internal space, not in production. C-145A Variant flown by USAF Special Operations Warfare Center. Similar to Skytruck, but with Pratt and Whitney PT6A-65B Turboprops. The USAF has started retiring the aircraft, with the first aircraft, AF Ser. No. 08-0310, delivered to the 309th Aerospace Maintenance and Regeneration Group at Davis-Monthan AFB, Arizona on 28 May 2015. By June 2015 eleven out of 16 aircraft were stored. MC-145B Wily Coyote In May 2021, the U.S. Special Operations Command (SOCOM) awarded a contract to Sierra Nevada Corporation (SNC) to demonstrate the MC-145B as part of the Armed Overwatch program, which is seeking to acquire a new manned light attack aircraft to support U.S. special operations forces in permissive environments. Renderings of the proposed aircraft depict a pair of sensor turrets (one under the nose and the other under the fuselage) as well as a pair of underwing hardpoints on each side (total four) outboard of the wing struts. Internally, eight reloadable Common Launch Tubes (CLT) are provided as well as a ramp-launch capability. Variants in use by Polish military PZL An-28TD Basic transport variant. Used mainly for transport and paratroop training (2 built). PZL M28B Several similar improved transport variants featuring avionics and airframe upgrades: Bryza 1TD (2 built), M28B (3 built), M28B Salon (1 built), M28B TDII, TDIII and TDIV (2 built of each). PZL M28B Bryza 1R Maritime patrol and reconnaissance variant (equipped with: 360° Search and Surveillance Radar ASR-400, Link-11 datalink). Used mainly for sea border patrolling, search and rescue operations and protection of the national economical sea zone (7 built).