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Last updated: 4 December 2021
Statuts:Enquête Officielle
Date:jeudi 3 septembre 2015
Type/Sous-type:Silhouette image of generic C550 model; specific model in this crash may look slightly different
Cessna 550B Citation Bravo
Immatriculation: OE-GLG
Numéro de série: 550-0977
Année de Fabrication: 2001
Heures de vol:7525
Moteurs: 2 Pratt & Whitney Canada PW530A
Equipage:victimes: 0 / à bord: 2
Passagers:victimes: 0 / à bord: 3
Total:victimes: 0 / à bord: 5
Dégats de l'appareil: Substantiels
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:Wien-Schwechat International Airport (VIE) (   Autriche)
Phase de vol: A l'atterrissage (LDG)
Nature:Charter International
Aéroport de départ:Salzburg-W. A. Mozart Airport (SZG/LOWS), Autriche
Aéroport de destination:Wien-Schwechat International Airport (VIE/LOWW), Autriche
The Cessna 550B Citation Bravo departed Salzburg, Austria with destination Vienna. As soon as the aircraft had been prepared for landing on runway 34, problems arose with the left main gear.
The green light for the left main gear did not illuminate. Both pilots agreed that they should continue to land. A few minutes later, when the aircraft landed on runway 34, the pilot flying noted that the left wing of the aircraft was moving downward. He tried to steer straight ahead, but without success. The left wing of the aircraft touched the runway 34 with its outer underside. The pilot could not prevent the deviation of the aircraft to the left. The aircraft came to a halt in the grassy area between runway 34, taxiway D and taxiway B5 and B6.
All passengers as well as the entire flight crew could leave the aircraft uninjured.

Probable Cause:

Probable causes (translated from German):
- A metallic foreign body between valve seat and ball of the spring loaded ball check valve in the undercarriage servo valve of the left main landing gear caused the check valve not to close as intended and hydraulic fluid was directed directly to the landing gear cylinder without moving the piston rod. Due to the fact that the piston rod of the undercarriage servo valve did not move as intended, the mechanical unlocking hook of the left undercarriage was also not controlled - the landing gear was therefore not deployed.
Contributing factors:
- The possibility to abort the approach, to Go Around and fly a holding to carry out troubleshooting, as described in the operations manual of the aviation company as well as in the "Emergency / Abnormal Procedures" manual of the aircraft manufacturer, was not used.
- The emergency extension system of the landing gear was not used.

Accident investigation:
Investigating agency: UUS Austria
Status: Investigation completed
Duration: 1 year and 10 months
Accident number: GZ. BMVIT-85.230/0001-IV/BAV/UUB/LF/2016
Download report: Final report

Opérations de secours

UUS Austria issued 3 Safety Recommendations

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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 Salzburg-W. A. Mozart Airport et Wien-Schwechat International Airport est de 266 km (166 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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