ASN Wikibase Occurrence # 242590
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Narrative:During the third rotation of the day to carry out the surveillance of electric lines of an MV network, the crew of the Hughes 500 struck and cut two cables of an HV line perpendicular to the trajectory followed. The navigation software used by the system operator did contain the HTB line, but the latter had not set the zoom level of the screen in order to view it and indicate it to the upstream pilot. In addition, in view of the environment and the arrangement of the poles of the HTB line, it was difficult for the pilot to detect it.
|Owner/operator:||Jet Systems Hélicoptères Service|
|Fatalities:||Fatalities: 0 / Occupants: 3|
|Aircraft damage:|| Substantial|
|Phase:|| En route|
|Destination airport:||Pouilly-Maconge Airfield (LFEP)|
|Investigating agency: ||BEA|
|Confidence Rating:|| Information verified through data from accident investigation authorities|
The pilot managed to maintain control of the helicopter and made a precautionary landing in a field 200 m in front of him in the center line, close to a municipal road.
The following factors may have contributed to the collision with the HV line while inspecting the MV grid:
Inappropriate management of the tools made available to inspect the powerline and monitor the neighbouring grids.
A pre-flight briefing which insufficiently reviewed the obstacles which would be present during the flight.
The difficulty of detecting powerlines when flying into the sun in an environment where there is little contrast and the poles do not reflect the light. Moreover, the poles were not in the pilot’s field of vision and were spaced at intervals of more than 600 m.
| || |
|Investigating agency: ||BEA |
|Status: ||Investigation completed|
|Duration: ||11 months|
|Download report: || Final report|
||Updated [Source, Accident report]|
||Updated [Embed code, Accident report]|
||Updated [Embed code, Narrative, Accident report]|
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