ASN Wikibase Occurrence # 150315
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| Date: | Monday 22 October 2012 |
| Time: | 15:30 LT |
| Type: |  Eurocopter EC 225LP Super Puma Mk2+ |
| Owner/operator: | CHC Scotia |
| Registration: | G-CHCN |
| MSN: | 2679 |
| Year of manufacture: | 2008 |
| Fatalities: | Fatalities: 0 / Occupants: 19 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | 32 nm SW of Sumburgh, Shetland Islands -
 United Kingdom
|
| Phase: | En route |
| Nature: | Offshore |
| Departure airport: | Aberdeen International Airport (ABZ/EGPD) |
| West Phoenix MODU, West of Shetland | |
| Investigating agency: | AAIB |
| Confidence Rating: |  Accident investigation report completed and information captured |
While operating over the North Sea, in daylight, the crew experienced a loss of main rotor gearbox oil pressure, which required them to activate the emergency lubrication system. Shortly after the system had activated, a warning illuminated indicating that the emergency lubrication system had failed. The helicopter ditched near the chemical tanker Nord Nightingale and all persons on board were recued by its Fast Rescue Craft
The loss of oil pressure on helicopters was caused by a failure of the bevel gear vertical shaft in the main rotor gearbox, which drives the oil pumps. The shafts had failed as result of a circumferential fatigue crack in the area where the two parts of the shaft are welded together and was due to corrosion.
The emergency lubrication system did activate. The failure warning was a false indication.
See also G-REDW.
Accident investigation:
 |
|
Sources:
http://www.aaib.gov.uk/publications/special_bulletins/s6_2012___ec225_lp_super_puma__g_chcn.cfm
http://www.aaib.gov.uk/publications/special_bulletins/s7_2012___ec225_lp_super_puma__g_chcn.cfm
https://www.gov.uk/aaib-reports/s2-2013-ec225-lp-g-redw-and-g-chcn-22-may-2012
https://www.gov.uk/aaib-reports/aar-2-2014-g-redw-and-g-chcn-10-may-2012
http://www.maritimeprofessional.com/news/offshore-helicopter-ditches-saved-merchant-228671
http://www.bbc.co.uk/news/uk-scotland-north-east-orkney-shetland-20033833
http://www.dailypost.co.uk/news/uk-world-news/2012/10/22/crew-return-from-ditched-helicopter-55578-32084474/
http://www.dailymail.co.uk/news/article-2222125/Super-Puma-helicopter-Dramatic-moment-19-oil-rig-workers-rescued-emergency-landing.html
http://www.bbc.co.uk/news/uk-scotland-north-east-orkney-shetland-20054080
http://aerossurance.com/news/aaib-report-ditchings-ec225-g-redw-10-may-2012-g-chcn-22-oct-2012/
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 22-Oct-2012 11:42 | gerard57 | Added |
| 22-Oct-2012 11:51 | harro | Updated [Aircraft type, Narrative] |
| 22-Oct-2012 12:02 | RobertMB | Updated [Time, Aircraft type, Registration, Operator, Narrative] |
| 22-Oct-2012 13:35 | gerard57 | Updated [Departure airport, Source, Narrative] |
| 23-Oct-2012 09:27 | vibrex | Updated [Registration] |
| 24-Oct-2012 01:04 | steve the humberside | Updated [Cn] |
| 24-Oct-2012 06:00 | MarkStep | Updated [Source] |
| 24-Oct-2012 10:37 | Dr. John Smith | Updated [Embed code] |
| 24-Oct-2012 13:55 | vibrex | Updated [Source, Embed code, Narrative] |
| 25-Oct-2012 11:40 | vibrex | Updated [Source, Embed code, Narrative] |
| 01-Nov-2012 08:31 | TB | Updated [Operator, Location, Destination airport, Source, Embed code, Damage, Narrative] |
| 27-Nov-2012 06:54 | Masen63 | Updated [Source, Narrative] |
| 18-Dec-2012 08:54 | Dr. John Smith | Updated [Operator, Location, Departure airport, Source, Embed code, Narrative] |
| 18-Dec-2012 08:57 | Dr. John Smith | Updated [Nature, Embed code] |
| 19-Dec-2012 12:20 | TB | Updated [Operator, Location, Source, Embed code, Narrative] |
| 27-Nov-2013 14:50 | TB | Updated [Damage] |
| 03-Aug-2014 19:08 | Aerossurance | Updated [Nature, Source, Narrative] |
| 25-Aug-2014 13:24 | TB | Updated [Location] |
| 18-Sep-2015 18:28 | Dr. John Smith | Updated [Source, Embed code] |
| 18-Sep-2015 18:28 | Dr. John Smith | Updated [Embed code] |
| 17-Oct-2015 15:47 | Aerossurance | Updated [Location] |
| 02-Oct-2016 13:39 | Aerossurance | Updated [Source] |
| 24-Jul-2020 15:39 | Aerossurance | Updated [Nature] |
| 30-Jan-2024 18:43 | Aerossurance | Updated [Departure airport, Destination airport, Source] |
| 30-Jan-2024 18:46 | Aerossurance | Updated [Narrative] |
| 31-Jan-2024 09:28 | harro | Updated [Other fatalities, Accident report] |
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