Not a jesus nut failure, but some versions of the Super Puma had a gearbox failure mode that caused several accidents with rotor separation from the helicopter.

Not a jesus nut failure, but some versions of the Super Puma had a gearbox failure mode that caused several accidents with rotor separation from the helicopter. For example this one that led to grounding of the EC225 and several related models: https://en.wikipedia.org/wiki/CHC_Helikopter_Service_Flight_241 https://en.wikipedia.org/wiki/CHC_Helikopter_Service_Flight_...