Each person who performs maintenance, preventive maintenance, rebuilding, or alteration of an aircraft, its powerplant, propeller, component or part shall make an entry in the maintenance record of that equipment containing the following information:1. A description of work performed and reference to data acceptable to CAA.2. The date of completion of the work performed.3. The name of the person performing the work.4. If the work performed satisfactorily, the signature, certificate number, and kind of certificate held by the person approving the work.Upon completing major repair or major alteration, signature of authorized person shall be entered on a form（as Attachment 3）, and the form disposed of, in the manner prescribed in Attachment 4.Each holder of Civil Air Transport Enterprise and General Aviation that is required by its approved operations specifications and maintenance program shall make a record of the maintenance, preventive maintenance, rebuilding, or alteration on aircraft, its powerplant, propeller, component or part which it operates in accordance with the applicable provisions of Aircraft Flight Operation Regulations, as appropriate.Attachment 3 CAA Form 337.pdfAttachment 4 Recording of Major Repairs and Major Alterations.pdf