What is the restoration of an aircraft/aeronautical product by acceptable methods after it has been disassembled and reassembled?

The restoration of an aircraft or aeronautical product after it has been disassembled and reassembled is referred to as a rebuild. This term specifically indicates that the product has undergone a significant level of restoration, which includes disassembly to the extent necessary for complete inspection and replacement of any worn or defective parts, followed by reassembly to bring the product back to a condition that meets the original specifications or updated standards.

In many cases, rebuilding will restore the performance and reliability of the aircraft, often extending its service life. This process is more extensive than a simple repair, which typically addresses specific issues without necessitating complete disassembly. The term overhaul is related but can encompass a broader range of maintenance activities and usually doesn't imply disassembly to the same degree. Preventive maintenance refers to routine maintenance tasks aimed at preventing failures rather than restoring or rebuilding the aircraft after disassembly. Thus, "rebuild" is the most accurate term for the described process.