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Civil Aviation Authority of Singapore

Production Organisation Approval

Learn about the approval required to manufacture parts or articles for Singapore registered aircraft.

Last updated 14 May 2026

Who can apply 

Singapore or overseas organisations that produce articles for Singapore-registered aircraft. 

Application process 

How to qualify 

You must meet the requirements under Singapore Airworthiness Requirements (SAR) Part 21, Subpart J. 

For instance, you must: 

  • submit a letter of intent

  • show the need for your services from any one of the following:

    • a Singapore air operator

    • a SAR-21 Approved Design Organisation

  • set up a production control system: 

    • how only approved designs are used 

    • processes for inspecting raw materials and parts 

    • appointment of certifying staff

    • quality assurance and internal audit procedures 

  • maintain relationship with design organisations: hold the design approval or have an arrangement with the holder, acceptable to CAAS, and maintain close collaboration to ensure product integrity

Production organisations based outside of Singapore

Organisations based outside of Singapore holding production approvals issued by partner Authorities may produce articles for Singapore-registered aircraft under a bilateral agreement, such as a Technical Arrangement on Airworthiness Certification (TA-AC).

When to apply 

You must apply for approval before you start: 

  • producing articles for Singapore-registered aircraft

  • issuing CAAS Authorised Release Certificates 

  • entering into a DO - PO arrangement

What are the fees

The fees payable are stated in the Air Navigation Order (ANO) Twelfth Schedule.

What is the processing time 

Processing timelines vary by application type and are set out in IC 6/2025 Information circular on service standards for processing of aviation safety instruments related to airworthiness, flight operations and training organisations.

You are encouraged to engage CAAS early to discuss your Production Organisation Approval application to facilitate timely processing.

How to apply

Phase 1: Pre-application  

  1. Have your Quality Manager (or equivalent) meet with us to learn more about the process before applying. You may contact us using our Enquiries & Feedback Form.

    The application should be made via the online application eSOMS. Forms stated in Phase 2 should only be used in the case of prolonged system downtime of eSOMS

    Note: CAAS will assign an officer to guide you through the application process.

Phase 2: Formal application

  1. Fill in and submit your application on eSOMS together with the required documents. The required documents are:

    • letter of application addressed to CAAS' Director of Flight Standards

    • letter of intent (from a Singapore Air Operator or a CAAS DOA)

    • SAR-21 approval application (use Form CAAS(AW)21B if eSOMS is not available)

    • personnel resume of accountable manager, senior person responsible for quality assurance and certifying staff (use Form CAAS(AW)22 if eSOMS if not available)

    • Nomination form for certifying staff (use Form CAAS(AW)102A if eSOMS is not available)

    • proposed Production Organisation Exposition describing your organisation, key personnel, resources, scope of production, conformity methods, and procedures

    • a copy of Form CAAS(AW)95 - Authorised Release Certificate (may be illustrated in the Production Organisation Exposition)

    • documentation evidencing that the applicant has and can obtain the use of appropriate facilities for the scope of work (e.g. lease agreement)

    • company's registration (for Singapore company, please provide ACRA or its equivalent)

    • any proposed manual (as applicable)

    • personnel training programmes

    • a Statement of Compliance for each applicable paragraph of SAR-21

    • a Schedule of Events with estimated timelines for the approval process 

If eSOMS is not available, download and submit CAAS(AW)21B Application form for SAR-21 Approval Organisation. 

Note: The application process will only start once the complete set of documents is received.

Phase 3: Document evaluation

  1. CAAS reviews your application documents to ensure that your processes and procedures comply with SAR-21.

    During this phase, CAAS may request for clarifications and amendments of the submitted documents. 

Phase 4: Demonstration and inspection

  1. CAAS interviews your staff and audits your facilities to verify that you have the required staff, resources and processes.

Phase 5: Certification

  1. You will receive your POA certificate once CAAS has verified that you comply with all of the requirements under SAR-21, and upon successful completion of payment. 

  1. After certification, CAAS conducts regular inspections to ensure certificate holders continue to meet safety and regulatory standards.

Application for POA

To apply, please contact us. An officer will be assigned to guide you through the application process.

Contact CAAS

What is the validity period 

An organisation approval is usually valid for 1 year from the date of issue unless surrendered, superseded, suspended or revoked. 

To renew your POA, submit your application 5 weeks to 2 months before expiry. 

Production organisations  

You can download the following lists which are updated monthly: 

Legislation, circulars and advisories  

Contact information 

Flight Standards Division
Contact us using the Enquiries & Feedback Form.