What describes the restoration of an aircraft using acceptable methods, including testing in accordance with approved standards?

The restoration of an aircraft using acceptable methods, including testing in accordance with approved standards, is accurately defined as an overhaul. An overhaul refers to a comprehensive examination and restoration of an aircraft or its components to a condition that meets regulatory safety and performance standards. This process typically involves disassembling, inspecting, repairing, and reassembling critical parts to ensure the aircraft's functionality and safety compliance.

In terms of the broader context, while repair and rebuild also involve restoring aircraft components, they may not always include the same level of thorough inspections or adherence to the stringent testing required during an overhaul. Repair usually refers to fixing specific issues without a complete disassembly, while rebuilding implies significant restoration but might not encompass the rigorous testing and standards associated with an overhaul. Preventive maintenance, on the other hand, focuses on routine upkeep to prevent issues rather than restoring a specific condition.

By highlighting the extensive procedures and compliance with approved standards, the definition of overhaul captures the full scope of actions necessary to ensure aircraft safety and reliability upon restoration.