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S7/2012 - EC225 LP Super Puma, G-CHCN

Date of occurrence: 22 October 2012

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.

Click here to read full details of this incident

Report name:
S7/2012 - EC225 LP Super Puma, G-CHCN
Registration:
G-CHCN
Type:
EC225 LP Super Puma
Location:
In the North Sea, approximately 32 nm southwest of Sumburgh, Shetland Islands
Date of occurrence:
22 October 2012
Category:
Commercial Air Transport - Rotorcraft
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.

Download report:
PDF icon S7-2012 G-CHCN.pdf (3,643.21 kb)