UK AAIB Feb 2009
 

Three accidents in Februarys Bulletin

G-CBHL Colin McRae's AS350, No preexisting mechanical defect could be found, makes interesting reading and its quite long. Possible servo transparency during harsh maneouvering.
Air Accidents Investigation: Eurocopter AS350B2 Squirrel, G-CBHL

G-CHCF AS332 L2 with freewheel failure on the good engine during OEI OPC.
Air Accidents Investigation: AS332L2 Super Puma, G-CHCF

G-BZYE R22 oversped by student with throttle open too far, continued with flight and reported it later, engine suffered power loss enroute to maintenance facility after test flight by CFI.
Air Accidents Investigation: Robinson R22 Beta, G-BZYE

They can all be found in http://www.aaib.gov.uk/cms_resources...2%2D2009%2Epdf