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Last updated: 21 April 2021
Statuts:Enquête Officielle
Date:jeudi 4 janvier 2018
Heure:ca 16:00
Type/Sous-type:Silhouette image of generic G150 model; specific model in this crash may look slightly different
Gulfstream G150
Compagnie:Private Airlines Germany
Immatriculation: OE-GKA
Numéro de série: 300
Année de Fabrication: 2011
Equipage:victimes: 0 / à bord: 1
Passagers:victimes: 0 / à bord: 0
Total:victimes: 0 / à bord: 1
Victimes au sol:victimes: 1
Dégats de l'appareil: Substantiels
Conséquences: Repaired
Lieu de l'accident:Kittilä Airport (KTT) (   Finlande)
Phase de vol: En attente (STD)
Nature:Convoyage
Aéroport de départ:Kittilä Airport (KTT/EFKT), Finlande
Aéroport de destination:Ekaterinburg-Koltsovo Airport (SVX/USSS), Fédération de Russie
Détails:
A Gulfstream G150 business jet, OE-GKA, arrived at Kittilä Airport in Finland in the afternoon of 2 January 2018. The jet carried four passengers and a three-person crew. The aircraft was parked at the north end of the apron. Once the passengers had left, the flight crew put covers on the engines and external sensors.
The next planned flight was a positioning flight on 4 January 2018, to Ekaterinburg, Russia, without passengers. The crew arrived at the airport to prepare for the flight at approximately 15:00. Take-off, as per the flight plan, was to happen at 17:00.
The ground handling company transported them to the aircraft by bus at approximately 15:20. The captain opened the door at which time the cabin assistant entered the cabin. The captain and the co-pilot placed their flight bags behind the cockpit and went back outside. The co-pilot placed the aircrew's baggage into the rear baggage compartment which opens from the outside. The captain and the co-pilot removed the engine covers which they had put in place on the day of their arrival. These were put into their own storage bags and also placed in the baggage compartment.
Following this, the captain went into the cockpit and started the APU, which generates electricity for aircraft systems and bleed air for heating the cabin. The co-pilot began to brush off the snow that had fallen on the aircraft. A moment later the captain came out to help the co-pilot. At first, he worked with his bare hands. Due to the extremely cold conditions (-22°C), however, he went back inside to fetch a pair of gloves. When he came back out, he closed the door.
A little later the cabin assistant inside the cabin felt strange pressure in her ears and chest.
She went into the cockpit and attempted to get the attention of the pilots working outside by knocking on the window. The pilots noticed the knocking and the captain went to open the door. According to the co-pilot’s observations it was unusually difficult for the captain to get the door open. Then, the captain pulled harder on the door handle at which time the door blew open with excessive force, hitting the captain who was standing underneath the door and knocking him to the ground. The pressure wave also knocked the co-pilot down, who had been standing approximately one metre from the left side of the door.
The co-pilot stood up and saw the captain lying on his back on the ground. Realising that the captain was unconscious, the co-pilot turned him on his side. Then he entered the cabin and saw the cabin assistant in a semi-seated position on the floor of the cabin. The co-pilot shook the assistant’s shoulder and advised her to go outside.
The captain died as a result of the serious injuries he sustained at the site of the occurrence. The co-pilot had not sustained any physical injuries. The cabin assistant had bruises on her right arm, continued to feel chest pain and was diagnosed with a mild concussion.
The cabin sustained substantial damage. The cockpit’s aft left bulkhead and the cabin’s forward left bulkhead were nearly torn off.

Probable Cause:

CONCLUSIONS:
1. When the aircraft is parked outside for a longer period, some pilots may close the outflow valve to prevent the ingestion of contaminants into the valve, or upstream into the cabin.
2. When the APU is being run one must check that the outflow valve is fully open. If it is not possible to ensure that the valve is open or to remove differential pressure by other means, the door must not be closed.
3. The door had no indication warning of excessive cabin pressure, nor an opening for depressurisation. The cabin was pressurised because the APU bleed air was ducted into the cabin, the outflow valve was closed and the door was also closed. Significant differential pressure existed between the cabin and the outside.
4. Cabin pressurisation on the ground also creates a hazard for several other groups of professionals, such as aircraft mechanics, ground handling staff, aircraft cargo loaders and rescue personnel.

Accident investigation:
cover
Investigating agency: AIB Finland
Status: Investigation completed
Duration: 280 days (9 months)
Accident number: L2018-01
Download report: Final report

Sources:
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Opérations de secours

AIB Finland issued 2 Safety Recommendations
EASA issued 1 EASA Safety Information Bulletin

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Photos

photo of Gulfstream-G150-OE-GKA
accident date: 04-01-2018
type: Gulfstream G150
registration: OE-GKA
 

Plan
Ce plan montre l'aéroport de départ ainsi que la supposée destination du vol. La ligne fixe reliant les deux aéroports n'est pas le plan de vol exact.
La distance entre Kittilä Airport et Ekaterinburg-Koltsovo Airport est de 2161 km (1351 miles).

Les informations ci-dessus ne représentent pas l'opinion de la 'Flight Safety Foundation' ou de 'Aviation Safety Network' sur les causes de l'accident. Ces informations prélimimaires sont basées sur les faits tel qu'ils sont connus à ce jour.
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