Tool and method for removing helical insert tang

A method of installing a helical insert in an aperture communicating with a gas path of a gas turbine engine, the helical insert having a tang, the method comprising:

• sliding a stem member of a tool relative a guide member of the tool, thereby exposing a tang catch of the stem member, including applying an external force against a bias force;
• moving the tang catch across a cylindrical cavity of the helical insert, towards the tang;
• while the tang catch is exposed, engaging the tang catch with the tang;
• while the tang is engaged with the tang catch, releasing the external force, the bias force thereby retracting the stem member in the guide member and engaging the tang against a working tip of the guide member;
• and
• rotating the helical insert in the aperture, thereby threadingly engaging a body of the helical insert with the aperture, including rotating the tool around a length of the tool, while the tang is engaged against the working tip by the bias force.

A method of removing a tang of a helical insert installed in an aperture with a tool, the method comprising:

• using the tool, while the tang is engaged with a tang catch of a stem member of the tool, and pushed against a working tip of a guide member of the tool by the tang catch by a bias force exerted passively by a biasing member between the guide member and the stem member, i) bending the tang back and forth relative the body of the helical insert, ii) breaking the tang off from a body of the helical insert, and iii) removing the tang from the aperture;
• further comprising, prior to said bending, breaking and removing:
• sliding the stem member relative the guide member of the tool, thereby exposing a tang catch of the stem member, including applying an external force against the bias force;
• moving the tang catch across a cylindrical cavity of the helical insert, towards the tang;
• while the tang catch is exposed, engaging the tang catch with the tang;
• and
• while the tang is engaged with the tang catch, releasing the external force, the bias force thereby retracting the stem member in the guide member and engaging the tang against the working tip of the guide member.