ASN Wikibase Occurrence # 236525
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| Date: | Monday 24 February 2020 |
| Time: | 19:56 UTC |
| Type: |  Sikorsky S-92A |
| Owner/operator: | Bristow Norway AS |
| Registration: | LN-ONT |
| MSN: | 920070 |
| Year of manufacture: | 2007 |
| Total airframe hrs: | 16643 hours |
| Engine model: | General Electric CT7A |
| Fatalities: | Fatalities: 0 / Occupants: 11 |
| Aircraft damage: | None |
| Category: | Serious incident |
| Location: | Maersk Invincible Drilling Rig, Valhall field, North Sea -
 Norway
|
| Phase: | Take off |
| Nature: | Offshore |
| Departure airport: | Maersk Invincible Drilling Rig (XMKI) |
| Stavanger-Sola Airport (SVG/ENZV) | |
| Investigating agency: | NSIA |
| Confidence Rating: |  Accident investigation report completed and information captured |
The crew of the Sikorsky S-92A helicopter lost control of the helicopter shortly after take-off from the helipad on the Maersk Invincible oil installation. The departure was made in the dark and under demanding conditions where the crew had no external horizon or external visual references. On board was a crew of two pilots and nine passengers.
The helicopter lost altitude, direction and speed. With a high nose up pitch, the helicopter accelerated backwards at a speed of 49 kt over a distance of 210 meters while losing further altitude. After approx. 40 seconds the crew regained control. The helicopter continued the flight to Stavanger Airport, Sola without further incidents.
The Norwegian Safety Investigation Authority finds that the crew was probably exposed to spatial disorientation during take-off. Together with overcorrection of the flight controls, this caused the helicopter to leave the normal departure profile.
Accident investigation:
 |
|
Sources:
https://havarikommisjonen.no/Aviation/Investigations/20-218
https://aerossurance.com/safety-management/night-offshore-take-off-loss-of-control-incident/
https://akerbp.com/en/asset/valhall/
Location
Media:
A 40s loss of control occurred during the transition from visual to instrument flight during a disorientating night offshore TO without an external horizon. https://t.co/iBCDHENnLy #offshore #helicopter #humanfactors #flightsafety #aviationsafety pic.twitter.com/mOgXTl8FK1
— Aerossurance (@Aerossurance) February 17, 2024
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 29-May-2020 12:27 | Aerossurance | Added |
| 22-Feb-2021 18:39 | harro | Updated [Source] |
| 15-Feb-2024 14:12 | harro | Updated [Other fatalities, Destination airport, Narrative, Category, Accident report] |
| 17-Feb-2024 15:01 | Aerossurance | Updated [Phase, Source] |
| 17-Feb-2024 16:04 | Aerossurance | Updated [Time, Source] |
| 17-Feb-2024 16:15 | Aerossurance | Updated [Embed code] |
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