AAIB investigation to EC225 LP Super Puma, G-CHCN - Special Bulletin S7/2012

Investigation update on the accident that occurred on 22 October 2012, in the North Sea, approx.32 nm southwest of Sumburgh, Shetland Islands

• From: Air Accidents Investigation Branch
• Published: 16 December 2014

• Category: Commercial - rotorcraft
• Report type: Special bulletin
• Date of occurrence: 22 October 2012
• Aircraft type: EC225 LP Super Puma
• Location: In the North Sea, approximately 32 nm southwest of Sumburgh, Shetland Islands
• Registration: G-CHCN

Summary:

This Special Bulletin contains information on the progress of the investigation into identifying the cause of the 360º circumferential crack in the bevel gear vertical shaft on G-CHCN (AAIB Special Bulletin S6/2012). It also compares the findings with those recorded previously on another EC225 LP accident involving a similar failure on G-REDW on 10 May 2012 (AAIB Special Bulletin S3/2012) and provides a further update on the investigation into both accidents.

The Chief Inspector of Air Accidents has ordered that the investigations into the accident to G-REDW on 10 May 2012 and to G-CHCN on 22 October 2012 be combined, and to publish an Inspector’s Investigation Report.

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Special Bulletin S7-2012 - EC225 LP Super Puma, G-CHCN

Published 16 December 2014