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


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.

Download report:

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

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