This could prove convenient:
Iran’s sole Simorgh AWACS aircraft was lost during a military parade Sept. 22, one of two Iranian military aircraft that crashed in Tehran while participating in a display to mark the anniversary of the start of the 1980-88 Iran-Iraq War.
But I think Israel Matzav and Instapundit are misreading the article when they call it Iran’s only AWACS. I read it to say the crashed plane was Iran’s only AWACS of that type.