Originally Posted by
wrench1
There are 2 methods. The primary method measures the external chordwise blade dimension from the tip/point of the leading edge to the blade trailing edge. Some operators will fabricate "go-no go" gauges for this dimension. The alternate method removes the tip cap and measures the thickness of the leading edge material as the aluminum alloy front blade structure is hollow. If either minimum dimension is exceeded the blade is removed from service.
Wrench...
Thanks.
The first method had occurred to me, but I had never heard of it actually being used.
I have heard of using ultrasonic wall thickness measurements on the sidewall just behind the nose, and then extrapolating that data to the leading edge, where that measurement method is not feasible.
DS