ASN Wikibase Occurrence # 168914
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| Date: | Friday 4 October 2013 |
| Time: | 17:00 LT |
| Type: |  Sikorsky S-92A |
| Owner/operator: | Bristow Norway AS |
| Registration: | LN-ONW |
| MSN: | 920090 |
| Year of manufacture: | 2008 |
| Fatalities: | Fatalities: 0 / Occupants: 14 |
| Aircraft damage: | Minor |
| Category: | Incident |
| Location: | Yme Offshore Installation, North Sea, 120nm SW of Stavanger -
 Norway
|
| Phase: | En route |
| Nature: | Offshore |
| Departure airport: | Stavanger |
| Valhalla offshore installation | |
| Investigating agency: | AIBN |
| Confidence Rating: |  Information verified through data from accident investigation authorities |
Enroute to the to Valhalla offshore installation when several warning lights in the cockpit came on. At the same time the main gearbox reduced cooling of the oil.
Indicated MGB pressure dropped to 49 psi with temperature working it's way up to 150 degrees, followed by Input #1 hot. Situation classified as "Land as Soon as Possible". The relatively high pressure would indicate a both pumps were working. It appears an electrical fault resulted in the oil cooler bypass activating (hence the temperature rise).
On 28 August 2013, another S-92A, operated in the Gulf of Mexico experienced a similar event. In that event the crew also landed safely on a platform with no damage to the aircraft nor injuries to the passengers or crew.
The crew decided to make a precautionary landing on the unmanned/closed Yme platform (17nm away). The passengers and crew were retrieved from the platform by RNoAF SAR Sea King.
Visibility reported to be poor, Sea State 5, winds 40-45 knots.
Accident investigation:
 |
|
Sources:
http://helihub.com/2013/10/04/bristow-issue-statement-on-s92-north-sea-emergency-landing/
https://www.pprune.org/rotorheads/524940-bristow-s-92-emergency-landing-yme-oil-platform.html
http://aerossurance.com/helicopters/s-92a-emergency-mgb-checklist/
https://www.aibn.no/Aviation/Published-reports/2015-11-eng
History of this aircraft
Other occurrences involving this aircraft
| 22 March 2010 | N921AL | Bristow U.S. | 0 | Galliano, Louisiana |  |
min |
| 22 October 2010 | N921AL | Bristow US LLC | 0 | Gulf of Mexico | |
min |
| 20 September 2011 | LN-ONW | Bristow Norway AS | 0 | North Sea | |
non |
| Oil and gas | ||||||
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 20-Aug-2014 06:54 | Aerossurance | Added |
| 20-Aug-2014 07:04 | Aerossurance | Updated [Narrative] |
| 30-Nov-2015 09:50 | Aerossurance | Updated [Source, Narrative] |
| 30-Nov-2015 10:08 | Aerossurance | Updated [Source] |
| 26-Sep-2016 13:34 | Aerossurance | Updated [Location, Narrative] |
| 27-Sep-2016 13:36 | Aerossurance | Updated [Time, Source] |
| 11-Sep-2020 18:53 | harro | Updated [Narrative, Accident report, ] |
Corrections or additions? ... Edit this accident description
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