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Civil Aviation Authority of Singapore

Certificate of airworthiness

Learn about aircraft airworthiness requirements in Singapore and how to apply for a Certificate of Airworthiness.

Last updated 14 May 2026

A Certificate of Airworthiness attests that the aircraft has been maintained in accordance with an approved maintenance programme and complies with applicable airworthiness and safety regulations and requirements for flight.

Application process

When to apply

You must apply for a Certificate of Airworthiness if you intend to operate a Singapore-registered aircraft.

Who can apply

The holder of an aircraft’s Certificate of Registration can apply.

How to qualify

You must meet all of the following requirements before applying:

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 Certificate of Airworthiness application to facilitate timely processing.

How to apply

Phase 1: Pre-application

Notify CAAS of your intention to apply for a Certificate of Airworthiness and purpose of the aircraft’s operation.

Phase 2: Formal application

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

  • aircraft flight manual

  • aircraft maintenance schedule

  • aircraft station licence

  • declaration of airworthiness compliance

  • list of incorporated modifications

  • status of airworthiness directives

  • aircraft basic weighing schedule

  • aircraft insurance coverage

  • any other relevant manuals and documents

Phase 3: Document evaluation

CAAS will review the application and documents submitted. During this phase, CAAS may request clarifications from the applicant.

Phase 4: Demonstration and inspection

CAAS will inspect your aircraft to verify that it complies with the airworthiness regulations and requirements.

Phase 5: Certification

Upon approval, CAAS will notify the applicant and the Certificate of Airworthiness will be available in eSOMS. Each certificate includes a QR code for authenticity.

You must also meet other applicable regulatory requirements, including those listed below:

Application for Certificate of Airworthiness

To apply, submit your application on eSOMS.

Apply on eSOMS

If eSOMS is unavailable:

What is the validity period

The Certificate of Airworthiness is valid for one year from the date of issue, unless it is earlier suspended, revoked, or the aircraft is deregistered from the Singapore Aircraft Register.

How to renew a Certificate of Airworthiness

To renew a Certificate of Airworthiness, submit a renewal application on eSOMS at least one month before it expires.

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

What are the conditions

As the holder of a Certificate of Airworthiness, you must ensure that your aircraft continues to comply with the applicable airworthiness regulations and requirements, and ensure that the certificate details for your aircraft remain accurate.

How to vary a Certificate of Airworthiness

To vary a Certificate of Airworthiness, notify CAAS and submit a variation application on eSOMS. There are no fees for a variation, and the existing validity period of the Certificate of Airworthiness remains unchanged.

Legislation, regulations and resources

Contact information 

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