Ecuador became a substantial customer for Israeli arms in the 1970s, purchasing Arava aircraft, Gabriel missiles for naval patrol craft, and Uzi submachine guns. Under technical assistance contracts, Israel serviced Israeli planes in the Ecuadorian Air Force inventory as well as Boeing civilian aircraft flown by TAME and "Ecuatoriana Airlines". Ecuador also reportedly employed Israeli security specialists as consultants in the fight against terrorism. In 1976 Ecuador became the first foreign country to order the Kfir, an advanced jet fighter equipped with the General Electric J-79 engine produced in Israel under license. The transaction, which required United States government approval because of the engine technology, was rejected by the administration of President Jimmy Carter in order to discourage the proliferation of sophisticated military equipment in the Third World. The action caused an uproar in Israel where the sale was regarded as an important breakthrough in Israel's efforts to develop international markets for the Kfir. In 1981, after the inauguration of President Ronald Reagan, Washington removed its objection to the sale. Although the contract called for the purchase of 12 Kfirs and an option to purchase an additional 12, Ecuador acquired only the original group, at a price estimated at US$196 million.