Before the crash Boeing Ukrainian Iran changed the level of readiness of air defense
The air defense system shot down the Ukrainian aircraft around Tehran in January 2020, was moved shortly before the crash, it follows from the amended report of the civil aviation Organization of Iran, dedicated to the investigation of the incident.
In a release posted on the organization's website, States that on 8 January (night Iran struck the location of American troops in Iraq), "has changed the level of preparedness" air defense systems.
The military has notified civil authorities of the control over the airspace that can fly airplanes, which granted the permission for departure from the military.
These routines are passed a Ukrainian plane: the center airspace control in 5.53 local time transferred the request of the Ukrainian aircraft on the flight coordination center air defense system that issued it.
"One of the air defense systems of Iran was displaced, which led to the change of the geographical position and direction of the complex," the report said.
The organization said that "due to human error" after the move was not carried out data reconfiguration, as not made "mandatory after the move action".
This, in turn, led to errors in data when it encounters a plane in such a way that the defense recognized it as "the purpose of moving from South-West to Tehran" (Iraq is a Western neighbor of Iran).
In fact, the plane flew on the North-West from Tehran, not from the South-West to the capital of Iran, report.
Thus, according to the report, the goal was an exchange of data between air defense and center, leading "to another chain of events" in which the operator identificeret the plane as an "enemy target" and getting no response from the coordinating center of defense, launches first missile at the plane, then the second.
Flying in Boeing 737-800 Kiev "Ukraine International airlines" crashed shortly after takeoff from Tehran on January 8, early in the morning. Killed 176 people: citizens of Iran, Ukraine, Canada, UK, Germany, Sweden and Afghanistan.
The Iranian military on 11 January said that the Ukrainian Boeing was shot down by accident, the reason was the human factor: the plane flew near the military site and Iran was taken for "enemy target", namely, cruise missile, they said. In the Iran-said that he expected attacks from the United States, in connection with which the air defense system of the country were given in full combat readiness. The President of Ukraine Vladimir Zelensky said that he expects Iran's full admission of guilt, a formal apology, punishment of perpetrators and compensation payments.