preliminary report (google translated from
https://tangosix-rs.translate.goog/2...leti-sa-d6)The Center for the Investigation of Traffic Accidents (CINS) published yesterday
the Notice on the initiation of the investigation into the Embraer Marathon Airlines accident on Air Serbia flight JU324 to Dusseldorf .
The preliminary report concludes that
"one of the probable causes of the accident is the inadequate assessment of take-off parameters during the pre-flight preparation of the flight crew and after the decision to take off with a shorter runway length compared to the initially planned one."
This confirms Tango Six's writing as the first and only media outlet to reconstruct probable contributing causes based on the information we gathered on the night of the accident . CINS states in the preliminary report that
there were no technical problems with the aircraft, the engine and other systems were working normally . Therefore, the probable conclusion of the final report, which,
according to the Chief Investigator's announcement, will be ready in about 3 months , will be
a human factor .
The preliminary report does not state any conclusions or explanations as to why the crew did what they did, but only presents the course and description of the events .
The preliminary report states that the event was classified as
an accident . The plane suffered
major damage to the fuselage, left wing and horizontal stabilizer .
The report states that the captain was a
58-year-old Italian with type ratings for the A320 and Embraer 170, while the co-pilot was Polish with an Embraer 170 rating . This was
the second flight for the flight and cabin crew after the return flight to Vienna. There were
2 pilots, 3 cabin crew members and 106 passengers in the plane .
The report recounts the course of events that Tango Six has already reconstructed and which was also confirmed by an audio recording of the conversation between air traffic control and the pilot that was found on social networks.
According to the statements given to CINS, the crew planned to take off from the position on the runway at intersection D6 , for which, as they stated, they performed
a "double check of the calculation of the take-off parameters" . During the departure from the gate, the crew received
clearance to taxi to intersection D6 from airport control, which they confirmed. The crew then reported to the control that they
were approaching the D6 intersection, to which they received a response to prepare for takeoff from D6 , exit and line up with the runway. Then comes the message of the second controller:
are they aware that they came out on D5 ?
The preliminary report states that
the controller then told the crew that TORA was 1273 meters .
The crew asked the control for a minute to make checks.
According to the statement of the crew, they then calculated the parameters for take-off using a hand-held flight computer in the hand-held tablet of the co-pilot . During this time, the controller informs the crew to perform the calculations and
also to report if they want to go back down the runway to position D6. The crew announced 30 seconds later that they were able to take off from D5 .
Air traffic control, according to the preliminary report, confirmed the reception but with
another question whether they were able to take off, which the crew immediately confirmed. Then they got the final approval to take off and the information that there was no wind .
The preliminary report then states that the plane took off leaving behind a cloud of dust and climbing slowly. According to the statements given, the cabin crew estimated that the plane had normal acceleration upon take-off. According to the statements, the flight crew made
changes in the thrust of the engine in order to get as high a speed as possible. At 80 knots, the crew stated that everything was fine, while at 100 knots, they noticed that there was not enough runway length . Considering the available length of the runway and the speed at which the plane was moving,
the crew decided that it was safer to continue the takeoff because they estimated that the plane would soon separate from the ground . According to the crew, the plane then started to
shake and they felt an impact on some object .
After separating from the ground, the crew then heard an unknown noise from the left side and noted that the lights on the left wing had stopped working. The crew began to receive information about
problems with a number of systems, the most significant of which were the flaps and non-functioning of the engine's warm air system ("bleed air"), and they proceeded to go through the appropriate "emergency" checklists .
The preliminary report then states that air traffic control asked if everything was OK since they had deviated from the approved takeoff vector. The crew replies that they are not sure but that they will most likely have to return to the airport.
Soon after, they declared a "mayday" (a general danger to flight safety) . The report then states the same events that Tango Six has already reconstructed.
During a low fly-by near the tower to visually confirm that the landing gear was extended, the crew reported
a problem with the flaps and increased vibrations on the plane. They decided to land at a higher speed due to problems with the flaps, but, as they said, within the prescribed limits. Apart from the occurrence of vibrations, they did not have any other problems during landing .
The report then states that the crew had no problem with the plane after landing, and after communicating with the control,
according to the instructions of the control, they reached the parking position at the gate C2 of the passenger terminal . After landing and leaving the runway, the plane was
followed all the time by the vehicles of the Belgrade Airport Fire and Rescue Unit. After stopping, the crew received information from the ground staff that fuel was leaking from the left wing, and quickly shut down the engine and other systems .
The crew and passengers were disembarked through the air bridge . After securing the place of the fuel leak, the authorities ordered the airport services to move the plane away from the airport building to a safer place as soon as possible, which was done. The fuel leak continued the next day, in addition to fuel leaking from the tank.
The preliminary report
states that the plane dragged its tail along the RESA surface, but does not provide more precise altitudes after immediate separation from the ground . He notes that
the approach lights for runway 12R are damaged and the control boxes in the middle of the lights are broken .
The antenna buried in the root of the left wing of the plane is
the "monitoring antenna of the ILS system" .