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Special Bulletin S2/2012 EC225 LP Super Puma G-REDW

Date of occurrence: 10 May 2012

Summary:
The crew of the helicopter carried out a controlled ditching following indications of a failure of the main gearbox (MGB) lubrication system and, subsequently, a warning indicating failure of the emergency lubrication system. All passengers and crew evacuated the helicopter into a life raft and were subsequently rescued. Two passengers sustained minor injuries. The investigation has identified a 360° circumferential crack in the bevel gear vertical shaft in the main gearbox, in the vicinity of a manufacturing weld, causing disengagement of the drive to both mechanical oil pumps.

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Report name:
EC225 LP Super Puma, G-REDW
Registration:
G-REDW
Type:
EC225 LP Super Puma
Location:
20 nm east of Aberdeen
Date of occurrence:
10 May 2012
Category:
Commercial Air Transport - Rotorcraft
Summary:
The crew of the helicopter carried out a controlled ditching following indications of a failure of the main gearbox (MGB) lubrication system and, subsequently, a warning indicating failure of the emergency lubrication system. All passengers and crew evacuated the helicopter into a life raft and were subsequently rescued. Two passengers sustained minor injuries. The investigation has identified a 360° circumferential crack in the bevel gear vertical shaft in the main gearbox, in the vicinity of a manufacturing weld, causing disengagement of the drive to both mechanical oil pumps.
Download report:
PDF icon S2-2012 G-REDW v2.pdf (248.96 kb)