ASN Wikibase Occurrence # 145549
Last updated: 30 September 2014
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Date:10-MAY-2012
Time:11:14
Type:Silhouette image of generic AS32 model; specific model in this crash may look slightly different
Eurocopter EC 225LP Super Puma Mk2+
Owner/operator:Bond Offshore Helicopters
Registration: G-REDW
C/n / msn: 2734
Fatalities:Fatalities: 0 / Occupants: 14
Other fatalities:0
Airplane damage: Substantial
Location:North Sea, 24 mi E of Aberdeen -   United Kingdom
Phase: En route
Nature:Non Scheduled Passenger
Departure airport:Aberdeen Airport (ABZ/EGPD)
Destination airport:Maersk Resilient drilling rig
Narrative:
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 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-CHCN.

Sources:
http://news.stv.tv/north/99144-helicopter-carrying-14-people-ditches-into-the-north-sea-off-scottish-coast/
http://www.mirror.co.uk/news/uk-news/north-sea-helicopter-crash-rescued-827441

http://www.aaib.gov.uk/publications/special_bulletins/s2_2012_ec225_lp_super_puma__g_redw.cfm
http://www.aaib.gov.uk/publications/special_bulletins/s3_2012___ec225_lp_super_puma_g_redw.cfm
http://www.aaib.gov.uk/publications/special_bulletins/s5_2012___ec225_lp_super_puma__g_redw.cfm
http://www.aaib.gov.uk/publications/special_bulletins/s2_2013_ec225_lp_super_puma__g_redw_g_chcn.cfm
http://www.aaib.gov.uk/publications/formal_reports/2_2014_g_redw_g_chcn.cfm
http://aerossurance.com/news/aaib-report-ditchings-ec225-g-redw-10-may-2012-g-chcn-22-oct-2012/
http://www.stepchangeinsafety.net/about/EC225information.cfm


Revision history:

Date/timeContributorUpdates
10-May-2012 06:55 RobertMB Added
10-May-2012 07:11 RobertMB Updated [Total fatalities, 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 fatalities, 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]
Number of views: 4194

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