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ASN Wikibase Occurrence # 228725
Last updated: 20 October 2021
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Time:10:46 LT
Type:Silhouette image of generic AS50 model; specific model in this crash may look slightly different
Eurocopter AS 350B3 Ecureuil
Owner/operator:Protection and Relief Intervention Group (by Meravo)
Registration: D-HAUE
MSN: 3549
Fatalities:Fatalities: 0 / Occupants: 6
Other fatalities:0
Aircraft damage: Substantial
Location:Pampilhosa da Serra Airfield, Coimbra -   Portugal
Phase: Take off
Nature:Fire fighting
Departure airport:Pampilhosa da Serra Airfield
Destination airport:
Investigating agency: GPIAAF Portugal
In the morning of September 4, at 9:30 am, the airborne crew of the Pampilhosa da Serra CMA was activated for a firefighting in Castelo Branco district, Portugal. The helicopter pilot made the usual preparations for the mission and ordered the 5 Republican National Guard members to board.
According to the pilot's statements, the engine start-up and flight preparation procedures were normal with no relevant issues to record until the time the Flight Command was selected, and a sudden increase in engine power was noticed. Immediately after, the aircraft began a vertical movement with some oscillations.
The aircraft rotated 90º clockwise, rose from the ground to a height of about one meter and the pilot could not counteract the low tail attitude and the descent aircraft movement.
On the downward trajectory, the aircraft touched hard with the back right leg and the tail rotor strike on the ground was inevitable. The aircraft returned to the air and rotated around its longitudinal axis until the main rotor also touched the ground. The aircraft without tail rotor and with the main rotor severely damaged became immobilized on its right side, about 3 meters ahead of the initial touch with the leg and tail rotor.

The investigation establishes as probable cause for the event the inadvertent movement of the twist grip by the pilot to the emergency range, MAX.
For the pilot actions on the aircraft controls may have contributed the:
- the different AS350 B3 2B and 2B1 models’ con-figurations,
- grip modification (073084) was not embodied on aircraft,
- pilot recent flight experience on the 2B1 model and the lack of recognition on the 2B1 to 2B mod-els differences,
- no onboard checklist adherence.


Accident investigation:
Investigating agency: GPIAAF Portugal
Status: Investigation completed
Duration: 1 month
Download report: Final report


Revision history:

04-Sep-2019 11:48 gerard57 Added
04-Sep-2019 12:23 gerard57 Updated [Source, Damage]
04-Sep-2019 13:40 Anon. Updated [Aircraft type, Total occupants, Source]
04-Sep-2019 13:41 harro Updated [Aircraft type, Registration, Cn, Source]
04-Sep-2019 14:24 RobertMB Updated [Aircraft type, Registration, Cn, Operator, Location, Departure airport, Source, Narrative]
04-Sep-2019 17:37 harro Updated [Location, Departure airport]
04-Sep-2019 19:48 Iceman 29 Updated [Time, Source, Embed code]
04-Sep-2019 23:19 RobertMB Updated [Location, Departure airport, Embed code]
01-Nov-2019 10:20 harro Updated [Time, Location, Departure airport, Narrative, Accident report, ]
19-Jun-2020 07:17 Aerossurance Updated [Source, Embed code]

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