Which entry best describes the action taken for replacing several damaged heli-coils in a casting, as detailed in the record example?

Which entry best describes the action taken for replacing several damaged heli-coils in a casting, as detailed in the record example?

• A. Eight 1/4----20inch standard heli-coils were replaced. The damaged inserts were extracted, the tapped holes gaged, then new inserts installed, and tangs removed.
• B. Eight 1/4---20inch standard heli-coils were installed in place of damaged ones.
• C. Eight 1/4---20 inch standard heli-coil inserts were repaired by replacing the damaged inserts with a lock-type insert, after the tapped holes were checked for corrosion.
• D. Eight 1/4----20inch standard heli-coils were replaced. The damaged inserts were extracted, the tapped holes gaged, then new inserts installed, and tangs removed.

Answer: (A)

Replacing damaged heli-coils in a casting involves a full replacement process: first take out the damaged inserts, then check and gauge the tapped holes to ensure the correct size and condition, next install new standard heli-coil inserts, and finally remove the tangs so the inserts sit flush. This sequence matches the record description, which specifies eight standard heli-coils were replaced, the damaged inserts were extracted, the tapped holes gauged, new inserts installed, and tangs removed. It reflects a complete replacement rather than simply installing new inserts in place or using a different repair method like a lock-type insert, which would not align with the documented steps.

Replacing damaged heli-coils in a casting involves a full replacement process: first take out the damaged inserts, then check and gauge the tapped holes to ensure the correct size and condition, next install new standard heli-coil inserts, and finally remove the tangs so the inserts sit flush. This sequence matches the record description, which specifies eight standard heli-coils were replaced, the damaged inserts were extracted, the tapped holes gauged, new inserts installed, and tangs removed. It reflects a complete replacement rather than simply installing new inserts in place or using a different repair method like a lock-type insert, which would not align with the documented steps.