A misaligned radar was the reason for the tragic downing of the Ukrainian plane near Tehran, Iranian authorities announced on Sunday.
"There was a failure due to a human error in the follow-up to the calibration procedure" of the radar system, which induced a "107-degree error" in the said system, no longer allowing it to correctly grasp the trajectory of the objects in its field, the official report says, according to AFP.
The incident occurred just several hours after Iran struck two Iraqi bases hosting US troops, and was awaiting possible clashes with American forces. The air strikes by Tehran were a response to the US-orchestrated assassination of Iranian general Qasem Soleimani earlier that month.
Iran later promised to hand the flight recorders from the aircraft to France's Bureau of Enquiry and Analysis for Civil Aviation Safety (BEA), with Paris and Tehran setting the date for reading the black boxes on 20 July 2020.