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.pdf
• Attachment 2 Items for Major Alterations, Major Repairs, and Preventive Maintenance.pdf

No person may describe in any required maintenance entry or form an aircraft, its powerplant, propeller, component or part as being overhauled unless:
1. Using methods, techniques, and practices acceptable to the CAA, it has been disassembled, cleaned, inspected, repaired as necessary, and reassembled; and
2. It has been tested in accordance with technical standards approved by CAA, or technical standards approved by Authorities of State of Design, or current standards and technical data developed by certificate holder which acceptable to the CAA.

No person may describe in any required maintenance entry or form an aircraft, its powerplant, propeller, component or part as being rebuilt unless:
1.Use either new part or used part that either conform to new part tolerances and limits or to approved oversized or undersized dimensions; and
2.It has been disassembled, cleaned, inspected, repaired as necessary, reassembled, and tested to the same tolerances and limits as a new item.

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.pdf
• Attachment 4 Recording of Major Repairs and Major Alterations.pdf

Except as provided in Paragraph 3 of Article 6, each holder of General Aviation by whom using aircraft that are type certificated for a passenger seating configuration, excluding any pilot seat, of nine seats or less, shall be inspected in accordance with approved progressive inspection program and make an entry in the maintenance record of that equipment containing the following information:
1.The type of inspection and a brief description of the extent of the inspection.
2.The date of the inspection and aircraft total time in service.
3.The signature, the certificate number, and kind of certificate held by the person.
4.If the aircraft is found airworthy and approved for return to service, or is not found airworthy and disapproved for return to service, the statement in Attachment 5 shall be addressed.
5.If an inspection is conducted under an approved maintenance program, the entry must identify name of that program and part of the program accomplished.
Except holder of Civil Air Transport Enterprise and General Aviation, each aircraft owner or operator shall make a record of inspection on aircraft, its powerplant, propeller, component or part as described in accordance with previous paragraph.
If the person performing any inspection required by previously2 paragraph of this Article finds the aircraft unairworthy, that person must give the owner or operator a signed and dated list of those discrepancies. Owner or operator shall place a placard on each inoperative instrument and the cockpit control of each item of inoperative equipment, marking it “Inoperative,” and shall add the items to the signed and dated list of discrepancies given to the owner or operator.

• Attachment 5 Statements for approval or disapproval the aircraft to return to service.pdf

No person may approve for return to service of any aircraft, its powerplant, propeller, component or part that has undergone maintenance, preventive maintenance, rebuilding or alteration unless:
1.The maintenance record entry required by Article 6 and 7, as appropriate, has been made; The identity of the approved maintenance organization, responsible for the authorization for signing a return to service, shall be included in the record entry.
2.The major repair or major alteration form furnished by CAA has been executed in a manner prescribed by the CAA;
3.If a repair or an alteration results in any change in the aircraft operating limitations or flight data contained in the aircraft flight manual, those operating limitations or flight data are appropriately revised and approved or accepted by CAA.
When the Powerplant, propeller, component or part has undergone maintenance, preventive maintenance, rebuilding, or alteration, an Authorized Release Certificate or a form accepted by CAA shall be filed out by authorized person as an evidence of airworthiness approval for return to service.

No person shall, either by his own will or intentionally by his employee or contracted person, group or repair station make any fraudulent or intentionally false entry in any record when performing maintenance, preventive maintenance, rebuilding or alteration work.
If an error was found in Maintenance record, authorized personnel shall make a correction in accordance with procedure accepted by CAA.
Aircraft owner or operator may establish managing procedures, upon being granted by CAA, to use electronic recording/signature system for signing and recording the maintenance record required by Article 6 to 8.

Each person performing maintenance, preventive maintenance, rebuilding or alteration on an aircraft, its powerplant, propeller, component or part shall use the methods, techniques, and practices prescribed in the current manufacturer's maintenance manual or Instructions for Continued Airworthiness prepared by its manufacturer, or other methods, techniques, and practices acceptable to the CAA.
Each person shall use the tools, equipment, and test apparatus necessary to assure completion of the work in accordance with accepted industry practices. If special equipment or test apparatus is recommended by the manufacturer involved, he must use that equipment or apparatus or its equivalent acceptable to the CAA.

Each person performing maintenance, preventive maintenance, rebuilding or alteration shall do that work in such a manner and use materials of such a quality, that the condition of the aircraft, its powerplant, propeller, component or part worked on will be at least equal to its original or properly altered condition.
The aforementioned ‘equal to its original or properly altered condition ‘means with regard to aerodynamic function, structural strength, resistance to vibration and deterioration, and other qualities affecting airworthiness.

Each person performing an inspection or maintenance specified in a manufacturer's maintenance manual, Airworthiness Limitations section of Instructions for Continued Airworthiness, shall perform the inspection or maintenance in accordance with operations specifications or maintenance program approved by CAA.