Modifications and Repairs Approval Certificate
Introduction
A Modifications and Repairs Approval Certificate serves as evidence to demonstrate that the changes to the type design of an aircraft, engine, or propeller under Modifications or Repairs are in compliance with the applicable airworthiness standards in CAAT Requirement No. 17, and environmental protection standards in CAAT Requirement No. 16 and Technical Committee Requirement No. 2.
Reference Regulations
Application and required documents
There are three phases associated with the Modifications and Repairs Approval Certificate:
Phase 1: Acceptance – The applicant applies for an acceptance of modification or repair data in the form of an acceptance letter, which authorises the modification or repair on the aircraft. The following documents must be submitted:
Phase 2: Conformity Inspection – The operator performs the modification or repair in accordance with the accepted data. CAAT may inspect the modification or repair of the aircraft. In case any findings identified during the inspection, the applicant must submit an evidence of corrective actions to CAAT.
Phase 3: Approval – The applicant submits the modification or repair result to CAAT to obtain the Modifications and Repairs Approval Certificate including:
Procedure
Phase 1 Acceptance
The applicant submits a modification or repair acceptance package to CAAT for initial review and acceptance of the package.
An assigned staff reviews the submitted application package to ensure compliance with CAAT Requirement No. 20 on Rules and Procedure for Approval of Modifications and Repairs to Type Certificate Product B.E. 2562.
The staff prepares and submits a package for a Letter of Acceptance to DG for approval.
The Letter of Acceptance is approved by DG.
The applicant is notified by the staff to obtain the Modification or Repair Acceptance letter.
Phase 2 – Conformity Inspection
The assigned staff makes an appointment with the applicant for the aircraft modification or repair inspection to ensure if the modification or repair is performed in accordance with the accepted instructions and meets all applicable CAAT continuing airworthiness requirements. Any findings identified during the inspection must be corrected before moving to the next phase.
Phase 3 – Approval
The applicant submits the modification or repair approval package for initial review and acceptance of the package.
An assigned staff verifies that the submitted application package complies with CAAT Requirement No. 20 on Rules and Procedure for Approval of Modifications and Repairs to Type Certificate Product B.E. 2562.
The staff prepares and submits the approval package to DG for approval.
DG reviews the package for approval certificate.
The applicant is notified by the staff to obtain the Modifications and Repair Acceptance Letter.
Remark: The issuance of the Mods and Repairs Approval Certificate will be cancelled if additional documents found to be missing or incorrect within 30 days after CAAT request.
Approval Duration
Issuance of the Mods and Repairs Approval Certificate must be completed within 36 working days.
Remark: Validation duration does not include applicant’s document correction period.
Modifications and Repairs Approval Certificate Fee
There is no fee associated with the issuance of the Modifications and Repairs Approval Certificate.
Eligibility
An owner or possessor of a Thai registered aircraft is eligible to apply for a Modifications or Repairs Approval Certificate.
Service Place/ Channel
The Civil Aviation Authority of Thailand 222 Soi Vibhavadi Rangsit 28,
Chatuchak, Chatuchak, Bangkok 10900
