ASN Wikibase Occurrence # 234328
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| Date: | Monday 23 March 2020 |
| Time: | c. 16:50 |
| Type: |  Scheibe SF 25E Super Falke |
| Owner/operator: | Trustee of the Falke Syndicate |
| Registration: | G-KDEY |
| MSN: | 4325 |
| Year of manufacture: | 1976 |
| Engine model: | Limbach SL 1700-EA1 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Aston Down Airfield, Minchinhampton, near Stroud, Gloucestershire -
 United Kingdom
|
| Phase: | Approach |
| Nature: | Private |
| Departure airport: | Aston Down Airfield, Stroud, Gloucestershire |
| Aston Down Airfield, Stroud, Gloucestershire | |
| Investigating agency: | AAIB |
| Confidence Rating: |  Accident investigation report completed and information captured |
AAIB investigation to Scheibe Super Falke SF25E, G-KDEY: Probable incapacitation followed by flight into terrain, Aston Down Airfield, Gloucestershire, 23 March 2020. The AAIB final report was published on 18 March 2021, and the following is an excerpt from it:
"The pilot of G-KDEY, was flying a series of circuits and was heading towards the airfield when the aircraft struck the ground in a field west of the airfield boundary.
The investigation found that carbon monoxide had been leaking from the exhaust and is likely to have impaired or rendered the pilot unconscious before the aircraft hit the ground.
The report highlights the EASA and CAA guidance on maintenance of piston engine exhaust systems to reduce the risk of carbon monoxide poisoning and the options available in selecting carbon monoxide detectors for General Aviation aircraft. A CAA safety leaflet and EASA report also highlights the issues associated with the use of Mogas and the increased risk of carburettor icing due to the ethanol content.
Conclusion
The investigation found evidence of exhaust system gas leakage in the engine bay and pathways by which the gas could have reached the cockpit. EASA SIB 2010-19 emphasises the need to carry out detailed inspections and maintenance of the exhaust system of piston engine powered aeroplanes.
The available evidence is consistent with the pilot having suffered CO poisoning and being incapacitated before the accident occurred. Although he reported regaining consciousness, it was not in time to prevent the accident.
The issues associated with the use of Mogas and the impact of ethanol content in fuel on carburettor icing are highlighted in CAA Safety Sense Leaflet 14 and EASA report EASA.2008.C51. The increasing popularity of Mogas, it’s low price, reduced environmental impact and the future increase in ethanol content makes incidents of carburettor icing more likely. Partial or complete engine failure due to carburettor icing could not be ruled out as a contributary factor in the accident".
Damage to airframe
Per the above AAIB report G-KDEY was "destroyed". As a result, the aircraft was de-registered and the regsitration cancelled with effect from 13 January 2021
Accident investigation:
 |
|
Sources:
1. AAIB Final Report: https://assets.publishing.service.gov.uk/media/604f448fe90e077fe5a7a114/Scheibe_Super_Falke_SF25E_G-KDEY_04-21.pdf
2. https://www.itv.com/news/westcountry/2020-03-24/man-in-life-threatening-condition-after-glider-crash-at-gloucestershire-airfield/
3. https://www.gloucestershirelive.co.uk/news/gloucester-news/glider-crashes-gloucestershire-man-taken-3976516
4. https://www.gov.uk/government/publications/aaib-current-field-investigations/air-accidents-investigation-branch-current-field-investigations
5. https://www.bbc.co.uk/news/uk-england-gloucestershire-52008146
6. https://www.flightradar24.com/data/aircraft/g-kdey
7. https://www.airport-data.com/aircraft/photo/001119182.html
8. https://www.jetphotos.com/photo/9471136
9. https://abpic.co.uk/pictures/registration/G-KDEY
Images:
Photo: AAIB
Media:
The pilot of a Scheibe SF25E (G-KDEY), was flying a series of circuits and was heading towards the airfield when the aircraft struck the ground in a field west of the airfield boundary.
— AAIB (@aaibgovuk) March 18, 2021
Read the AAIB report:https://t.co/mMZFa1nMJo pic.twitter.com/BSFAmzZfss
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Mar-2020 07:53 | gerard57 | Added |
| 24-Mar-2020 14:17 | Geno | Updated [Time, Location, Source] |
| 24-Mar-2020 16:01 | Aerossurance | Updated [Aircraft type, Location, Narrative] |
| 16-May-2020 19:34 | sharla82 | Updated [Aircraft type, Registration, Source] |
| 16-May-2020 19:35 | harro | Updated [Aircraft type, Cn] |
| 16-May-2020 19:35 | harro | Updated [Aircraft type, Narrative] |
| 09-Jul-2020 17:23 | Dr. John Smith | Updated [Operator, Location, Phase, Departure airport, Destination airport, Source, Narrative] |
| 18-Mar-2021 18:04 | harro | Updated [Phase, Narrative, Accident report, Photo] |
| 19-Mar-2021 21:45 | Dr. John Smith | Updated [Operator, Source, Embed code, Narrative] |
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