GE Frame 9E -TIL 1720 for Stage 3 Bucket Airfoil Inspection

Hi,
We are operating with a S3B kit that is applicable to subject TIL in one of 9E turbine. That is every 100 factored starts, Fluorescent Penetrant Inspection to be completed.
So far we have completed three consecutive inspections with zero findings. Since the Turbine operate as a peaking unit, we have accumulated 450 starts with 2000 Factored hours only.

How significant is this 100 starts interval? is there any margine allowed like 10% with 100 starts?
and has any user experience about this discussion with GE before?

Any information would help. Thanks!
TIL 1720 is attached FYR
 

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