Persons authorized to perform or approval for return to service after maintenance, preventive maintenance, rebuilding, or alteration shall comply with provisions in Attachment 1.Those items, the performance of which is a major alteration, a major repair, or preventive maintenance, as listed in Attachment 2.Attachment 1 Persons authorized to perform and return to service an aircraft, its powerplant, propellers, component or part after maintenance, preventive maintenance, rebuilding or alteration.pdfAttachment 2 Items for Major Alterations, Major Repairs, and Preventive Maintenance.pdf