The flight attendant was almost hit by the aircraft’s turbine parts during a serious take-off incident

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A serious incident on October 13 had started its investigation and was classified as a serious incident according to a preliminary report with the first data collected after parts of the turbine section of the engine of a Fokker 100 nearly hit a flight attendant on the plane.

Engine housing damaged by failure – Image: CAO Iran

The preliminary report was released this week by the Accident Investigation Council (AIB), which was set up by the Iranian Civil Aviation Organization (CAO) to investigate the fact and determine the possible causes that led to the engine failure during take-off. Tehran city airport.

How it all happened

According to the publication, it was the Fokker 100, registered under EP-ATE registration and operated by Iran Aseman Airlines, when it made its way from the Iranian capital to Ardabil in the same country on Tuesday, October 13th departed on flight number EP-3962.

Image: Konstantin / GFDL 1.2, via Wikimedia Commons

The jet left the Mehrabad airport terminal with 7 crew members and 87 passengers on runway 29L and when taking off about 500 meters after taking off the runway at a speed of 91 knots (168 km / h), engine number 2 is shown (right-hand side ) of the aircraft failed.

At this moment the pilot in charge successfully aborted the process and returned to the airport courtyard without any further incident, as the speed was still below the limit value for aborting the take-off (V1). The passengers disembarked and were taken to their destination in a replacement aircraft.

After the accident, representatives of the investigation teams went on site and took the first steps to assess the severity of the accident, and the flight information recorders were disassembled from the aircraft.

Preliminary finds

Preliminary evaluations indicated that a fault had occurred in the high pressure turbine (HPT) section of the engine, which resulted in some parts, including the turbine blades, being ejected and passed through the safety housing.

It was found that some leaves hit the fuselage and entered the passenger cabin. Fortunately, despite the proximity of a flight attendant to the crash site in the aircraft cabin where the fragments passed, he or other occupants were fortunately not injured.

The pierced fuselage directly above the engine mount – Image: CAO Iran

Parts of the internal rotating sections of the motors concentrate high amounts of energy that can be fatal if it reaches the human body, which is why the propellants are designed to contain the fragments in their safety enclosures.

So when such a problem occurs where parts are ejected, the incident is classified as “Engine Damage Not Included”.

Preliminary observations and expert opinions indicate that a motor shaft failure was likely the cause of this accident, so further specific investigations are required.

The report also mentions that a similar accident has already happened to a Brazilian Fokker aircraft that resulted in the death of a passenger. Since similar events can have fatal consequences, it was decided to seriously investigate this accident.

A notice was sent to the country of manufacture and the aircraft designer (the Dutch Fokker) about the start of the investigation and the formation of the Accident Investigation Commission, in which, in addition to the Dutch, Germans and English were invited as representatives of the designer and manufacturer of engines and related parts.

The AIB concludes that the investigation process has not yet been completed and that the final report will be presented once it has been completed.

Information from the Iranian Civil Aviation Organization

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