Leakage testing tool for component and related method

A method of leakage testing a component, the method comprising:

• coupling a leakage testing tool to an opening in the component, the leakage testing tool having:
• a seal assembly for sealing an opening in the component, the seal assembly having:
• a front plate defining a pressure chamber around the opening in the component;
• a collar coupled with the front plate and surrounding sidewalls of the component;
• an insert extending between the front plate and the collar;
• an annular seal member between the collar and the insert;
• and
• a floating seal between the collar and the front plate;
• and
• a valve for controlling fluid flow into the pressure chamber;
• flowing a testing fluid into the pressure chamber and the opening in the component through the valve;
• and
• measuring a fluid flow or a pressure within the pressure chamber to detect a leak in the component.