Unfallbericht:
The Learjet 31 prototype operated on a demonstration flight for a prospective buyer. The aircraft landed hard at Les Eplatures Airport about 50 m past the threshold of runway 24 following a high sink rate.
Probable causes:
The accident was caused by an abnormally high rate of descent arising from the combination of an extreme nose-up attitude of the aircraft and the reduction in engine power just before making contact with the runway.
Factors contributing to the accident:
1) The plane was piloted by unqualified pilot on this aircraft type and having only a minor experience on jet aircraft.
2) The available runway length was at the limit of the aircraft's performance.
3) The steep slope of the approach that is 4 °, due to obstacles.
4) The terrain configuration on the approach and the rising slope of the runway.
5) The concern of the flight instructor on the difficult approach, which lay outside the usual operating conditions.
6) Lack of coordination between crew members in the phase preceding the accident.
| Status: | Accident investigation report completed and information captured |
| Datum: | Mittwoch 26 Oktober 1988 |
| Zeit: | 09:00 |
| Flugzeugtyp: |  Learjet 31 |
| Fluggesellschaft: | Gates Learjet |
| Kennzeichen: | N311DF |
| Werknummer: | 31-001 |
| Baujahr: | 1987-09-04 (1 year 2 months) |
| Betriebsstunden: | 448 |
| Anzahl Zyklen der Zelle: | 250 |
| Triebwerk: | 2 Garrett TFE731-2-2B |
| Besatzung: | Todesopfer: 0 / Insassen: 2 |
| Fluggäste: | Todesopfer: 0 / Insassen: 3 |
| Gesamt: | Todesopfer: 0 / Insassen: 5 |
| Sachschaden: | schwer beschädigt |
| Konsequenzen: | Repaired |
| Unfallort: | Les Eplatures Airport ( Schweiz)
|
| Flugphase: | Landung (LDG) |
| Betriebsart: | Demonstration |
| Flug von: | Zürich-Kloten Airport (ZRH/LSZH), Schweiz |
| Les Eplatures Airfield (LSGC), Schweiz |
The Learjet 31 prototype operated on a demonstration flight for a prospective buyer. The aircraft landed hard at Les Eplatures Airport about 50 m past the threshold of runway 24 following a high sink rate.
Probable Cause:
Probable causes:
The accident was caused by an abnormally high rate of descent arising from the combination of an extreme nose-up attitude of the aircraft and the reduction in engine power just before making contact with the runway.
Factors contributing to the accident:
1) The plane was piloted by unqualified pilot on this aircraft type and having only a minor experience on jet aircraft.
2) The available runway length was at the limit of the aircraft's performance.
3) The steep slope of the approach that is 4 °, due to obstacles.
4) The terrain configuration on the approach and the rising slope of the runway.
5) The concern of the flight instructor on the difficult approach, which lay outside the usual operating conditions.
6) Lack of coordination between crew members in the phase preceding the accident.
Accident investigation:
 |
|
Fotos
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 Zürich-Kloten Airport to Les Eplatures Airfield as the crow flies is 138 km (86 miles).
Distance from Zürich-Kloten Airport to Les Eplatures Airfield as the crow flies is 138 km (86 miles).
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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