ASN Wikibase Occurrence # 145549
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| Date: | 10-MAY-2012 |
| Time: | 11:14 LT |
| Type: |  Eurocopter EC 225LP Super Puma Mk2+ |
| Owner/operator: | Bond Offshore Helicopters |
| Registration: | G-REDW |
| MSN: | 2734 |
| Fatalities: | Fatalities: 0 / Occupants: 14 |
| Other fatalities: | 0 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | North Sea, 34nm E of Aberdeen -
 United Kingdom
|
| Phase: | En route |
| Nature: | Passenger - Non-Scheduled/charter/Air Taxi |
| Departure airport: | Aberdeen Airport (ABZ/EGPD) |
| Maersk Resilient drilling rig | |
| 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. This required the crew to ditch their helicopters immediately in the North Sea, which was done successfully and all persons on board were recued.
The loss of oil pressure 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-CHCN.
Sources:
1. https://stv.tv/news/north/99144-helicopter-carrying-14-people-ditches-into-the-north-sea-off-scottish-coast/
2. https://www.mirror.co.uk/news/uk-news/north-sea-helicopter-crash-rescued-827441
3. https://www.gov.uk/aaib-reports/ec225-lp-super-puma-g-redw-10-may-2012
4. https://www.gov.uk/aaib-reports/s3-2012-ec225-lp-super-puma-g-redw-10-may-2012
5. https://www.gov.uk/aaib-reports/s5-2012-ec225-lp-super-puma-g-redw
6. https://www.gov.uk/aaib-reports/s2-2013-ec225-lp-g-redw-and-g-chcn-22-may-2012
7. https://www.gov.uk/aaib-reports/aar-2-2014-g-redw-and-g-chcn-10-may-2012
8. http://aerossurance.com/news/aaib-report-ditchings-ec225-g-redw-10-may-2012-g-chcn-22-oct-2012/
9. https://www.stepchangeinsafety.net/about/EC225information.cfm
Accident investigation:
 |
|
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 10-May-2012 06:55 | RobertMB | Added |
| 10-May-2012 07:11 | RobertMB | Updated [Total occupants, Departure airport, Destination airport, Source, Damage, Narrative] |
| 10-May-2012 07:23 | RobertMB | Updated [Registration, Cn] |
| 10-May-2012 16:54 | RobertMB | Updated [Location, Source, Damage, Narrative] |
| 11-May-2012 12:38 | chulian1819 | Updated [Embed code] |
| 18-Oct-2012 03:55 | TB | Updated [Operator, Location, Departure airport, Source, Embed code, Narrative] |
| 01-Nov-2012 08:24 | TB | Updated [Time, Aircraft type, Total occupants, Location, Source, Embed code, Narrative] |
| 27-Nov-2012 06:54 | Masen63 | Updated [Source, Narrative] |
| 18-Dec-2012 09:12 | Dr. John Smith | Updated [Destination airport, Source, Embed code, Narrative] |
| 19-Dec-2012 12:15 | TB | Updated [Destination airport, Source, Embed code, Narrative] |
| 03-Aug-2014 19:08 | Aerossurance | Updated [Nature, Source, Narrative] |
| 25-Aug-2014 13:24 | TB | Updated [Location] |
| 17-Oct-2015 15:42 | Aerossurance | Updated [Location] |
| 30-Sep-2016 14:41 | Aerossurance | Updated [Time, Narrative] |
| 26-Oct-2016 15:06 | Dr.John Smith | Updated [Source, Embed code] |
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