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Which operation would be described as preventive maintenance?

A

Repair of landing gear brace struts.

B

Replenishing hydraulic fluid.✓ Correct Answer

C

Repair of portions of skin sheets by making additional seams.

Explanation

14 CFR Part 43 Appendix A(c) lists preventive maintenance items, including refilling hydraulic fluid in the hydraulic reservoir. Repairing landing gear brace struts and repairing skin by adding seams are listed as repairs (major or minor), not preventive maintenance.

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