ASN Wikibase Occurrence # 174517
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| Date: | 26-SEP-2012 |
| Time: | 08:25 LT |
| Type: |  Sikorsky S-76C++ |
| Owner/operator: | Bristow Helicopters |
| Registration: | G-CGOU |
| MSN: | 760780 |
| Fatalities: | Fatalities: 0 / Occupants: 10 |
| Other fatalities: | 0 |
| Aircraft damage: | Minor |
| Location: | 19 miles ENE of Humberside Airport, Central North Sea -
 United Kingdom
|
| Phase: | En route |
| Nature: | Offshore |
| Departure airport: | Humberside Airport (HUY/EGUY) |
| Ravenspurn Gas Field Platform | |
| Investigating agency: | AAIB |
There was a smell of smoke in the cockpit and cabin during flight, together with an unusual and uncommanded flying motion. A precautionary landing was made, and a subsequent investigation identified that an electrical short had occurred in a wiring loom.
During a short cruise climb, the helicopter began to pitch nose up and roll to the right, so the commander disengaged the autopilot and established straight and level flight. The co-pilot remarked that he could smell smoke and suggested a return to Humberside.
As the commander turned the helicopter, he noticed it was in STABILITY AUGMENTATION SYSTEM mode and was yawing in an uncommanded “fishtailing” motion. The crew transmitted a ‘PAN PAN’call and informed ATC of the situation. Although there was no visible smoke, a strong smell persisted. The commander decided to make a precautionary landing at a private coastal airfield less than two miles away. The eight passengers were briefed for the precautionary landing, which was completed safely.
After landing, some of the passengers reported that they too had smelt smoke in the cabin and been aware of the fishtailing motion.
The manufacturer recognizes that the area is potentially susceptible to chafing and is currently
studying several methods of product improvement that would reduce this susceptibility for both future and delivered aircraft.
Sources:
http://www.caa.co.uk/aircraft-registration/
https://www.gov.uk/aaib-reports/sikorsky-s-76c-g-cgou-26-september-2012
Accident investigation:
 |
|
Images:
Photo of G-CGOU courtesy AirHistory.net
Humberside (EGNJ / HUY)
12 June 2011; (c) Joop de Groot
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 14-Mar-2015 15:39 | Aerossurance | Added |
| 22-Mar-2015 14:31 | TB | Updated [Location] |
| 18-Sep-2015 17:31 | Dr. John Smith | Updated [Time, Aircraft type, Total occupants, Location, Departure airport, Destination airport, Source, Embed code, Narrative] |
| 18-Sep-2015 17:33 | Dr. John Smith | Updated [Narrative] |
| 29-Sep-2016 16:36 | Aerossurance | Updated [Time, Aircraft type, Location, Destination airport, Source, Narrative] |
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