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ASN Wikibase Occurrence # 182429
Last updated: 16 January 2022
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Time:09:45 UTC
Type:Silhouette image of generic TBM7 model; specific model in this crash may look slightly different
Socata TBM700
Owner/operator:Avia-Rent Wallonie SCRL
Registration: OO-TBM
MSN: 3
Fatalities:Fatalities: 0 / Occupants: 1
Other fatalities:0
Aircraft damage: Substantial
Category:Serious incident
Location:Genk-Zwartberg (EBZW) -   Belgium
Phase: Landing
Departure airport:Liège-Bierset (EBLG)
Destination airport:Genk-Zwartberg (EBZW)
Investigating agency: AAIU Belgium
At the end of a short 12-minute flight from EBLG to EBZW the pilot checked the landing gear position indication lights, confirmed he saw three greens and no red light and entered the landing circuit.
In the final leg, after the flaps were extended to landing position, the pilot checked again the landing gear position lights. The touchdown and the first phase of the landing were uneventful, however the nose landing gear collapsed as soon as it made contact with the runway.

The cause of the serious incident is the failure of the nose landing gear actuator to lock down combined with the landing gear control system wrongly indicating that this landing gear was properly extended and locked.
The root cause of the serious incident is an spurious triggering of the NLG actuator extend dual switch into “extend and locked”.
Investigation determined that the activation system of the dual switches has the potential to cause simultaneously a false indication (showing 3 greens and no red light) on the LGCP and stop the operation of the electro-hydraulic generator, interrupting the landing gear leg extension before reaching the locked position.
Contributing factors:
• The mechanical improvement of the actuators involving the installation of differential plungers (MOD70-0334-32), introduced in December 2012, was not applied to the aircraft.
• The possibility to improve the safety of the landing gear system by installing the differential plungers (MOD70-0334-32) was not communicated and was not recommended to the end-users


Accident investigation:
Investigating agency: AAIU Belgium
Status: Investigation completed
Duration: 2 years and 4 months
Download report: Final report
Safety recommendations:

Safety recommendation BE-2017-0011 issued by AAIU Belgium to EASA
Safety recommendation BE-2017-0012 issued by AAIU Belgium to Daher-Socata


Socata TBM-700 at Birmingham-BHX, 05/02/14. OO-TBM (12329856654)


Photo of OO-TBM courtesy

Farnborough (EGLF / FAB)
15 July 2014; (c) Fred Willemsen

Revision history:

17-Dec-2015 20:01 LowRider Added
18-Dec-2015 06:58 harro Updated [Aircraft type]
31-Jul-2016 21:41 Dr.John Smith Updated [Departure airport, Destination airport, Source, Embed code, Narrative]
29-Sep-2017 19:50 harro Updated [Time, Total occupants, Source, Narrative]
25-Apr-2018 19:21 harro Updated [Operator]

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