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ASN Wikibase Occurrence # 174517
Last updated: 24 July 2020
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Date:26-SEP-2012
Time:08:25 LT
Type:Silhouette image of generic S76 model; specific model in this crash may look slightly different
Sikorsky S-76C++
Owner/operator:Bristow Helicopters
Registration: G-CGOU
C/n / 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)
Destination airport:Ravenspurn Gas Field Platform
Narrative:
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


Images:

Photo of G-CGOU courtesy AirHistory.net


Humberside (EGNJ / HUY)
12 June 2011; (c) Joop de Groot

Revision history:

Date/timeContributorUpdates
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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