Patent ID: 7772840

Claim:
An eddy current testing method for a turbine rotor comprising a disc, a plurality of turbine blades disposed along the periphery of said disc, and a plurality of pins for joining a blade fork portion formed on each of said plurality of turbine blades to a disc fork portion formed on said disc, comprising the steps of: inserting a probe having an eddy current testing sensor into a first hole formed through said disc fork portion and a first blade fork portion of a first turbine blade of said plurality of turbine blades by pulling out a first pin, which joins said first turbine blade to said disc, of said plurality of pins; inserting a supporting member for supporting said probe into a second hole formed through said disc fork and a second blade fork portion of a second turbine blade, which is different from said first turbine blade and is positioned in said periphery, of said plurality of turbine blades by pulling a second pin, which joins said second turbine blade to said disc, of said plurality of pins; and performing eddy current testing for at least part of the internal surface of said first hole by using said probe.