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Status:Schlussbericht
Datum:Freitag 1 Juni 2007
Zeit:22:53
Flugzeugtyp:Silhouette image of generic GLF5 model; specific model in this crash may look slightly different
Gulfstream G-V
Fluggesellschaft:G5 Executive
Kennzeichen: HB-IMJ
Werknummer: 517
Baujahr: 1997
Triebwerk: 2 Rolls-Royce BR700-710A1-10
Besatzung:Todesopfer: 0 / Insassen: 4
Fluggäste:Todesopfer: 0 / Insassen: 5
Gesamt:Todesopfer: 0 / Insassen: 9
Sachschaden: schwer beschädigt
Konsequenzen: Repaired
Unfallort:Zürich-Kloten Airport (ZRH) (   Schweiz)
Flugphase: Landung (LDG)
Betriebsart:Internationaler außerplanmäßiger Passagierflug
Flug von:Rotterdam Airport (RTM/EHRD), Niederlande
Flug nach:Zürich-Kloten Airport (ZRH/LSZH), Schweiz
Flugnummer:EXH152
Unfallbericht:
The Gulfstream V was conducting an ILS approach to runway 14 at Zürich-Kloten Airport, Switzerland when the crew noticed that the nose landing gear failed to extend. After retracting the undercarriage again, there was a drop in pressure of the left hand hydraulic system. A second approach was flown and again the nose landing gear failed to extend. A low pass over runway 14 so the condition of the nose gear could be observed from the ground. The alternate procedure to get gear down failed, as did g-load manoeuvres.
At 22:53 a forced landing was carried out with the nose gear retracted.

Probable Cause:

Ursachen
Der Unfall ist darauf zurückzuführen, dass am Bugfahrwerk door actuator alle vier Befestigungsschrauben des Abschlussdeckels (gland) des shuttle valve rissen und der Abschlussdeckel brach. Als Folge davon konnte das Bugfahrwerk nicht ausgefahren werden.
Zum Unfall beigetragen haben:
- Versagen des Notsystems infolge eines Lecks, welches durch den abgetrennten Abschlussdeckel des shuttle valve verursacht wurde
- Nicht geeignete und unzureichend angezogene Befestigungsschrauben am Abschlussdeckel des shuttle valve
- Geringe Materialstärke des Abschlussdeckelflansches

Accident investigation:
cover
Investigating agency: BFU Switzerlnd
Status: Investigation completed
Duration: 11 months
Accident number: Nr. 1985
Download report: Final report
Language: German


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Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Rotterdam Airport to Zürich-Kloten Airport as the crow flies is 576 km (360 miles).
Accident location: Approximate; accuracy within a few kilometers.

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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