ASN Wikibase Occurrence # 190569
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| Date: | Saturday 8 October 2016 |
| Time: | 14:36 UTC |
| Type: |  Fournier RF-47 |
| Owner/operator: | Private |
| Registration: | F-PNDF |
| MSN: | 01 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Oordegem near Aalst, East Flanders -
 Belgium
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Koksijde Air Base (EBFN) |
| Grimbergen Airfield (EBGB) | |
| Investigating agency: | AAIU Belgium |
| Confidence Rating: |  Accident investigation report completed and information captured |
During a navigation flight, the engine began to sputter and lose power. The pilot searched for a suitable location for a forced landing and decided to land on a ploughed field. The engine completely stopped operating in final before touch-down. During the landing, the aeroplane flipped over, leaving the pilot slightly injured and the aeroplane significantly damaged.
Cause:
The direct cause of the accident (the flip-over) is an improper pitch-up attitude (not enough “holding off”) during a forced landing on a soft terrain as a consequence of an engine failure. The engine breakdown (=indirect cause) was due to an insufficient gap between the valve rotators and the rocker arms. This caused an unwanted mechanical contact between these parts followed by a rapid wear of the valve keys ending in the engine failure.
Contributing safety factor:
Performing non-routine maintenance on critical aircraft components without having extensive technical experience.
Other safety factor:
The lack of technical documentation and/or guidance from the engine manufacturer to warn the mechanics about the “valve stem wear phenomenon”, possibly causing an insufficient gap between the valve rotators and the rocker arms.
Accident investigation:
 |
|
Sources:
http://www.hln.be/hln/nl/957/Binnenland/article/detail/2909594/2016/10/08/Sportvliegtuig-crasht-tijdens-noodlanding.dhtml
Images:
F-PNDF at Keiheuvel Airfield, 30 July 2011 (c) H. Ranter/ASN
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 09-Oct-2016 07:09 | jan olieslagers | Added |
| 09-Oct-2016 07:09 | harro | Updated [Operator, Total fatalities, Total occupants, Source, Plane category] |
| 09-Oct-2016 07:12 | harro | Updated [Aircraft type, Cn, Other fatalities, Nature, Damage, Narrative, Photo, ] |
| 09-Oct-2016 07:45 | jan olieslagers | Updated [Location, Damage, Narrative] |
| 09-Oct-2016 07:46 | harro | Updated [Plane category] |
| 21-Sep-2018 10:20 | harro | Updated [Phase] |
| 14-Nov-2018 18:59 | harro | Updated [Time, Phase, Departure airport, Destination airport, Narrative, Accident report, ] |
| 09-Nov-2022 00:22 | Ron Averes | Updated [Location, Departure airport, Destination airport] |
Corrections or additions? ... Edit this accident description
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