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| Date: | Wednesday 24 August 2016 |
| Time: | 16:02 |
| Type: |  HB Flugtechnik HB-207 RG Alpha |
| Owner/operator: | Private |
| Registration: | HB-YLO |
| MSN: | 021 |
| Year of manufacture: | 2005 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Other fatalities: | 0 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | near Bad Ragaz Airport (LSZE) -
 Switzerland
|
| Phase: | Unknown |
| Nature: | Private |
| Departure airport: | Samedan (LSZS) |
| Investigating agency: | STSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
Forced landing in a field.
Cause
The accident occurred during an emergency field landing when an amateur-built aircraft was damaged because its propulsion system failed due to a failure of the propeller reduction gear drive belts.
The combination of the following factors was determined to be the cause of the drive belt failure:
- Poor execution of maintenance work;
- Unclear instructions on the alignment and tensioning of the propeller reduction gear drive belts;
- Inadequate hardware specifications for propeller support fasteners.
- Subsequently, inappropriate flight tactics resulted in a landing on unfavourable terrain, which increased the extent of damage caused by the incident.
Accident investigation:
 |
|
Sources:
STSB
History of this aircraft
Other occurrences involving this aircraft
| 14 May 2019 | HB-YLO | Private | 1 | near Birrfeld Airfield (LSZF) | |
w/o |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 29-Apr-2018 07:45 | harro | Added |
| 22-Jan-2021 21:09 | harro | Updated [Cn, ] |
Corrections or additions? ... Edit this accident description
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