ASN Wikibase Occurrence # 66283
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| Date: | Wednesday 30 August 1961 |
| Time: | |
| Type: |  Jodel D-9 |
| Owner/operator: | private |
| Registration: | HB-SUN |
| MSN: | 73 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Oberwil -
 Switzerland
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Dällikon Airfield |
| Lachen | |
| Investigating agency: | BFU Switz. |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot took off from the airfield Dällikon in fine weather for a private flight to Lachen. On the way, around 18:30, at an altitude of 200-300 m above the hamlet of Lieli-Oberwil, the propeller broke away from the aircraft. During the emergency landing, the aircraft overturned and was severely damaged; the pilot was uninjured.
The accident was caused by fatigue fractures in the propeller mounting, caused by stresses not foreseen in the design due to a drop in the pretension of the structurally unsound mounting bolts, partly due to the installation of a structurally inadequate and untested propeller cowl and due to the failure to carry out adequate checks during maintenance.
Sources:
BFU Switzerland
Accident investigation:
 |
|
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 06-Jul-2009 03:27 | VHKDK | Added |
| 29-Dec-2022 13:56 | harro | Updated [Operator, Total fatalities, Total occupants, Other fatalities, Phase, Nature, Departure airport, Destination airport, Source, Damage, Narrative, Accident report] |
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