What is classified as a major repair when dealing with parachute fittings?

Replating a load-carrying parachute fitting is classified as a major repair because it directly affects the structural integrity and load-bearing capacity of the parachute system. Parachute fittings are critical components that connect various parts of the parachute, and any alterations or repairs to these fittings must be done with the utmost precision to ensure safety.

When replating a fitting, it usually involves removing the existing plating and applying a new layer to restore its function and protect it from wear and corrosion. This type of maintenance requires a thorough understanding of materials and potential impacts on the overall performance of the parachute equipment, making it a significant repair task. In contrast, the other options represent either minor repairs or alterations that do not have the same level of impact on the parachute's overall safety and functionality.