Air Force Variants Izdeliye U – The in-house designation of the four-engined passenger aircraft derived from the Izdeliye N An-8 project. An-10 – The designation of the prototype and initial production versions fitted with Kuznetsov NK-4 or Ivchenko AI-20A engines. An-10A – Production aircraft from December 1959 with increased seating, decreased empty weight/increased payload and Ivchenko AI-20K engines. An-10AS – Several aircraft modified for small package cargo transport with no seats. An-10B (first use of designation) – Version with improved avionics and seating for 118 passengers. An-10B (second use of designation) – An An-10A configured to carry 132 passengers. This was achieved by increasing the number of seats in a row to seven and adding two more rows in the middle cabin. Seats in the front and middle sections reclined for passenger comfort. The tail was also modified. Extra fuel tanks were also fitted to increase range. One aircraft built in 1962. An-10D – Projected version with range increased to with fuel tanks in the wing torsion box and seating for 124 passengers. The engines were moved outward and fiberglass propeller blades fitted to reduce noise and increase efficiency. Production of a prototype was planned for 1960. An-10KP – (Komandny Punkt – command post) A single aircraft (CCCP-11854) modified as an airborne command post for use at Sperenberg Airfield, near Berlin in the DDR. An-10TS – (Transport/Sanitarny – transport/ambulance) 45 aircraft ordered for the VTA (Voyenno-Transportnaya Aviatsiya – transport air arm), with 38 loaned to the Ministry of Civil Aviation. An-10V (later An-16) – An-10A lengthened by and wider fuselage to carry 174 passengers at a range of or 128 passengers at a range of . Development began in 1963, but the aircraft was never built. An-16 – An-10 lengthened by to carry 130 passengers. Development began in 1957, but following an order for another variant, the aircraft was never built. Accidents and incidents Over its life, the An-10 experienced 15 accidents, with 373 fatalities. The An-10 carried more than 35 million passengers and 1.2 million tons of cargo. On 29 April 1958, an An-10 (CCCP-L7256) of MAP Voronezh AZ crashed at Pridacha Airport during a test flight following double engine failure, killing one of five crew. Shortly after takeoff, engine number one overheated and failed due to prolonged operation in takeoff mode; the engine control system reduced power to engine number four to avoid asymmetric thrust. Engine number three