Boeing Ukrainian shot down in Iran: an error of adjustment of the radar to the origin of the drama

Boeing ukrainien abattu en Iran: une erreur de réglage de radar à l'origine du drame

TEHRAN | THE”key element” to the cause of the tragedy of the Boeing ukraine shot down on January 8, near Tehran (176 dead) is a “human error”, the improper adjustment of a military radar had been tracking other dysfunctions, according to a report from civil Aviation of iran.

That night, the air defenses of the islamic Republic were in a state of maximum alert for fear of an american attack.

Iran had just attacked the missile base used by the us army in Iraq in response to the removal a few days earlier, in a strike in the u.s. to Baghdad, general Qassem Soleimani, the architect of the regional strategy of Iran, and was expecting a reply from Washington.

In these conditions, due to the replacement of a unit of air defence of Teheran, “there has been a breach due to human error in the monitoring of the procedure,” calibration of a radar system, writing the civil aviation Organization of iran (CAO) said in a report posted online Saturday night on its website.

According to the document, it has led to an “error of 107 degrees” in the system used by the unit, not allowing to understand the trajectory of objects in its field.


This initial fault “is at the origin of a string dangerous (events), which of course could be controlled if other measures had been taken,” writes the CAD.

But according to its document, presented as a “report the facts” and not as the final report of the investigation, other errors have occurred in the minutes that followed.

Civil Aviation is thus a defect in the transmission to the coordination centre of the defence units of the data on the target identified by the radar.

A general in iran stated in January that a number of communications had been scrambled that night.

The CAO notes that, in spite of the erroneous information it had on the trajectory of the aircraft, the operator of the radar system would have been able to identify his target as an airliner, but on the contrary, it is wrong in the analysis, and there has been “mis-identification”.

The report also notes that the first of the two missiles fired on the plane was set on fire by the operator of a battery of defence, without that it would have received a response from the coordination centre” which he depended on.

The second missile was fired thirty seconds later, taking into account “the continuity of the trajectory of the detected target”, the report adds.

The flight PS-752 of the company Ukraine International Airlines (UAI) which connects Tehran to Kiev, was gunned down on 8 January by two missiles.

Of the 176 people on board the aircraft, a Boeing 737, the majority of Iranians and Canadians, but also 11 Ukrainians (including nine crew members) perished.

The tragedy has elicited a sharp reproof in Iran, especially after he had taken three days for the armed forces acknowledge that they have shot down the plane “by mistake”, and after that an operator of a battery of missiles took it for a missile.

For months, Canada and the Ukraine are demanding that Iran sends the black boxes abroad for the data to be analyzed, the islamic Republic does not have the technical means to do so.

The canadian minister of foreign Affairs François-Philippe Champagne on Sunday called on Iran to ” ensure a thorough investigation and transparent in accordance with international standards, so that all those guilty be held accountable “.

Black boxes

At the end of June, the Bureau d’enquêtes et d’analyses (BEA) of france has indicated that Iran had officially “asked (his) technical assistance to repair and download data from the black boxes.

The work on the “Cockpit Voice Recorder” (CVR), which records conversations between the pilots and sounds in the aircraft, and “Flight Data Recorder” (FDR), which is all the flight parameters (speed, altitude, engine speed, trajectory, etc), “is expected to begin on 20 July,” according to the BEA.

At the beginning of July, Canada announced that it has received Iran’s agreement in principle to start negotiations on the compensation of the families of foreign victims.

According to Ottawa, the “coordination group” of countries, whose nationals died in the crash (Canada, United Kingdom, Ukraine, Sweden, and Afghanistan), has signed a “memorandum of understanding” opening formally the way for negotiations with Tehran.

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