Accident Aérospatiale SA.341G Gazelle N505HA, Wednesday 5 September 2018
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Date:Wednesday 5 September 2018
Time:10:28 UTC
Type:Silhouette image of generic GAZL model; specific model in this crash may look slightly different    
Aérospatiale SA.341G Gazelle
Registration: N505HA
MSN: 1022
Year of manufacture:1972
Total airframe hrs:1453 hours
Engine model:Turbomeca Astazou IIIA
Fatalities:Fatalities: 0 / Occupants: 4
Other fatalities:0
Aircraft damage: Substantial
Location:Kortrijk-Wevelgem International Airport (KJK/EBKT) -   Belgium
Phase: Take off
Departure airport:Kortrijk-Wevelgem International Airport (KJK/EBKT)
Destination airport:Valenciennes/Denain Airport (XVS/LFAV)
Investigating agency: AAIU Belgium
Confidence Rating: Accident investigation report completed and information captured
The helicopter took off vertically from a parking spot between two hangars outside of the aerodrome perimeter at the northside of the Kortrijk-Wevelgem Airport (EBKT).
While hovering at 80 ft AMSL (approximately 8 m AGL), a sudden stall of the compressor (surge) occurred and the engine lost power.
The pilot decided to land the helicopter in autorotation by reducing the collective pitch and moving the cyclic control forward. The helicopter made a hard landing in the grass area just in front of the aerodrome perimeter fence.
The main rotor hit the fence and catapulted a fence pole 50 m away. The helicopter finally came to a rest on its left side.

Findings as to causes and contributing factors
- An improper setting of the fuel flow control (FFC) lever which resulted in a sudden loss of power caused by a surge of the gas turbine engine. [direct cause]
- The practice to hover out of ground effect and transition to forward flight (operating in the shaded area of the H/V diagram), also asked for a big power demand reducing the margin between power required and power available. [cause]
- The helicopter was loaded near its maximum mass, also reducing the margin between power required and available. [contributing factor]
- Because the helicopter was operating in the shaded area of the H/V diagram, the pilot was unable to land his helicopter safely. [contributing factor]
- The dirty airpath of the engine air intake could have contributed to a reduced surge margin of the engine. Together with the light tail wind possibly contributed to the surge of the compressor. [contributing factor]
- The layout of the movement area of the aerodrome at time of the accident led helicopter pilots to ‘jumping over the fence’. This was a common practice at EBKT and, although foreseen in the Aerodrome Operating Manual, the airport authorities did never give any feedback to the concerned pilot or state its standpoint regarding the adequacy of the takeoff practices. [contributing factor]

Accident investigation:
Investigating agency: AAIU Belgium
Report number: AAIU-2018-09-05-01
Status: Investigation completed
Duration: 2 years and 9 months
Download report: Final report

registration from; c/n from Air Britain:

History of this aircraft

Other occurrences involving this aircraft

8 June 1988 JA9164 Toho Airlines 0 Tokyo Heliport sub



Revision history:

05-Sep-2018 11:32 sundevil Added
05-Sep-2018 11:35 harro Updated [Location, Phase, Nature, Damage, Narrative]
05-Sep-2018 11:36 harro Updated [Aircraft type, Total fatalities, Other fatalities, Location, Embed code, Narrative]
05-Sep-2018 11:44 harro Updated [Operator, Total occupants, Phase, Nature, Departure airport, Source, Embed code, Narrative]
05-Sep-2018 11:48 harro Updated [Aircraft type, Narrative]
05-Sep-2018 12:53 mxcollins Updated [Aircraft type, Narrative]
05-Sep-2018 15:24 Geno Updated [Aircraft type, Registration, Cn, Source]
05-Sep-2018 15:51 HeliNews Updated [Registration, Cn, Source]
05-Sep-2018 16:00 Aerossurance Updated [Aircraft type]
05-Sep-2018 17:31 franka Updated [Aircraft type, Registration, Cn, Source]
05-Sep-2018 18:19 HeliNews Updated [Source]
24-Sep-2021 19:40 harro Updated [Time, Departure airport, Destination airport, Narrative, Accident report]
09-Oct-2021 13:53 Aerossurance Updated [Source]
09-Oct-2021 14:02 Aerossurance Updated [Phase, Embed code]
09-Nov-2022 01:04 Ron Averes Updated [Location, Embed code]
22-Nov-2023 10:45 harro Updated [Other fatalities, Accident report]

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