 After western sanctions following the Iranian Revolution, the general official policy of Iranian government changed from having the best available in the world to being able to manufacture independently in order to meet domestic needs, specially of technological products and therefore becoming "sanction-proof".In no other field this urgency was higher than aeronautics.Therefore, Iran has avoided the need to purchase better western aircraft available to it from time to time in favor of inferior ones that could be manufactured in Iran through arrangements of purchasing licenses and technologies as well as reverse-engineering parts, mostly to avoid situations that Iran has gone through during the 1980s till now by not being able to maintain what it had due to domestic technological starvation.