this photograph is the lower side of a new (300 hour) stainless r22 blade.
the cracks extend between the red lines.
most of the hours have been done at a flying school.
one of the
four different incidents of blade delaminations was only detected when the blade was removed by a service centre.
there has been one instance from canada i am told. of the four instances in australia they have all been well under 1000 hours
go back to the old blade regime and do a thorough examination of the blade root laminates. even maybe the old tap test.
a defect report has been lodged with casa but nothing yet.