contract was signed, this time with the Venezuelan Air Force for 24 IA-58A equipped with Garrett TPE331-11-601W turboprop engines, at U$110 million. Venezuela cancelled the purchase order. A number of OV-10A Broncos were negotiated and later incorporated from the USAF stocks instead, with credit facilities. In March 1985, a new contract with the Iraqi Air Force, which was later disbanded due political foreign issues, was signed with Iraq for 20 IA-58A with 20 more on option for U$76 million. In May 1986 the Bolivian Air Force requested 12 IA-58A for U$52 million, with no purchase orders placed. Iran negotiated 60 IA-58A for U$283 million by April 1987 and at the end of that year a new deal for 50 planes at U$160 million with no purchase orders ever placed. In November 1987, six Pucarás were negotiated with the Force Aérienne Zairoise for US$26.7 million, contract cancelled. In 1990 the Brazilian Air Force announced a purchase of 30 IA-58A as part of the project SIVAM. But with the development of the Embraer EMB 314 Super Tucano, the order was cancelled. In 1991 a purchase order was negotiated by the Paraguayan Air Force for four IA-58A at U$10.6 million but later disregarded. Variants AX-02 Delfín: Prototype. AX-04: A torpedo-carrying prototype. IA-58A Pucará: Two-seat counter-insurgency, close air support, attack aircraft. Main production version. To be retired September 2019. IA-58B Pucará Bravo: Modified two-seat counter-insurgency aircraft, with deeper forward fuselage, allowing the 20 mm Hispano cannon to be replaced by two 30 mm DEFA cannons, and with more advanced avionics. One prototype aircraft converted from IA-58A first flew on 15 May 1979. IA-58C Pucará Charlie: Single-seat version designed to take advantage of lessons learned during the Falklands War, with increased capability in anti-shipping and anti-helicopter missions. Forward cockpit removed, with additional 30 mm DEFA cannon supplementing existing gun armament, and capability to carry Matra R550 Magic air-to-air missiles and Martin Pescador air-to-surface missiles underwing. Increased armour protection fitted, and more advanced EW system suite. Single prototype converted, flying on 30 December 1985, but plans to convert fifteen more for the Argentine Air Force abandoned in 1988 due to lack of funding. IA-58D Pucará Delta: Current program modernisation of existing IA-58A airframes, featuring new avionics systems and PT6A-62 Pratt & Whitney engines. Also noted as IA-58H. Program restarted in June 2019 with certification planned in July 2019. IA-66: Modification of IA-58A powered by two 1,000-ehp