Incident Diamond DA40 Diamond Star F-GUVQ, 26 Jun 2011
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ASN Wikibase Occurrence # 294232
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Type:Silhouette image of generic DA40 model; specific model in this crash may look slightly different    
Diamond DA40 Diamond Star
Owner/operator:Diamant Air
Registration: F-GUVQ
MSN: D4.131
Fatalities:Fatalities: 0 / Occupants:
Other fatalities:0
Aircraft damage: Minor
Location:Montélimar Ancone Airport -   France
Phase: En route
Departure airport:Clermont-Ferrand Auvergne Airport (CFE/LFLC)
Destination airport:Cannes-Mandelieu Airport (CEQ/LFMD)
Investigating agency: BEA
Confidence Rating: Accident investigation report completed and information captured
The pilot was navigating between the airfields of Clermont-Ferrand Aulnat and Cannes Mandelieu. After approximately 1 hour of flight, while cruising at FL95, over the Montélimar aerodrome, the pilot noticed that the "ECU(2) A fail" and "ECU B fail" lights came on, followed by a decrease in engine power of about 5%. He carried out a forced landing on the Montélimar airfield.


The incident was due to the deterioration of a wire of the Vrail plug, probably during its replacement in March 2009. The successive interventions, during which the Prail valve was connected and disconnected several times, probably led to the final breakage of the wire.

This disconnection led to the complete opening of the Prail valve. The resulting fuel pressure in the intake manifold then dropped, resulting in a significant loss of engine power and the inability to maintain level flight.


Accident investigation:
Investigating agency: BEA
Status: Investigation completed
Download report: Final report

Revision history:

10-Oct-2022 19:45 harro Added

Corrections or additions? ... Edit this accident description

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