ASN Wikibase Occurrence # 182429
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| Date: | Thursday 17 December 2015 |
| Time: | 09:45 UTC |
| Type: |  Socata TBM700 |
| Owner/operator: | Avia-Rent Wallonie SCRL |
| Registration: | OO-TBM |
| MSN: | 3 |
| Year of manufacture: | 1990 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Serious incident |
| Location: | Genk-Zwartberg Airfield (GNK/EBZW) -
 Belgium
|
| Phase: | Landing |
| Nature: | Ferry/positioning |
| Departure airport: | Liège Airport (LGG/EBLG) |
| Genk-Zwartberg Airfield (GNK/EBZW) | |
| Investigating agency: | AAIU Belgium |
| Confidence Rating: |  Accident investigation report completed and information captured |
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.
Cause:
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:
 |
|
Sources:
https://mobilit.belgium.be/sites/default/files/downloads/accidents/2015-16-final_report.pdf
Media:
Socata TBM-700 at Birmingham-BHX, 05/02/14.
.jpg)
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 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] |
| 08-Nov-2022 13:13 | Ron Averes | Updated [Location, Departure airport, Destination airport] |
Corrections or additions? ... Edit this accident description
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