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§Transfer within Singapore – Original owner surrender STC to Authority and handover data file to new holder. New STC to reflect new holder details.

§Transfer from foreign to Singapore – CAAS assumes State of Design responsibilities

§Transfer from Singapore to foreign – Authority transfers responsibilities; suspends STC as foreign Authority issues new STC

ØPrivileges of an STC holder

§Approve minor design changes

§Enter into arrangements for production

Enter into arrangements for change of product

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Minor change to product covered by STC may be made by STC holder without first obtaining the approval of Authority. Authority must be notified of changes within 3 months.

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Major change to the product covered by a STC must not be made without Authority’s approval and application for such approval can only be made by STC holder.

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- Standard parts may be released on Certificate of Conformity. ARC is not mandatory

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Minor changes to a product may be made without STC. A minor changes may be approved by Authority or holder of DOA

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>Maintain currency of Exposition Document and operate in accordance with it
>Provide support for approved product or article - product in service can continue to meet airworthiness requirements
>Report any failure, defects and malfunctions
>Take timely corrective actions to unsafe features
>Provide corrective action proposal to Authority
>Accommodate Authority for conducting investigation, test, inspection or audit
>Duration of Approval / Certificate validity is usually 1 year
>No duration means valid until surrendered, superseded, suspended or revoked.

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- Maintain and keep the record for the life of the repair

- Record to be kept include complete and current technical data of each STSO article and complete inspection records for compliance that the repair have been properly completed

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The standard adopted by Authority for

Standard parts, materials and processes

- Any officially recognized industry specifications that are accepted by the Authority

- Standard part is an article which:

- Does not require a specific airworthiness approval

- Made to a national (eg. Mil Spec) or international aeronautical specification

-Identified as such by manufacturer

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- Major changes cannot be made without Authority approval
- A Supplemental Type Certificate (STC) signifies a design approval for a major change to the type design

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> Applicant of repair design Approval shall hold the DOA or arrangement for design configuration control of repairs

> If the repair has no significant airworthiness implication then the applicant who is not holding a DOA may obtain a grant of repair design approval
> Any design change to the approved repair will require a new application.

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Products

- Issued by Authority

- Contained in regulation issued by FAA including FAR Parts 23, 25, 27, 29, 33, 35 and 36

- Issued by the relevant authorities of other  Contracting States in compliance with Annex 8 and 16.

STSO

- Issued by Authority

- Established by FAA for TSO approval

- Issued by the relevant authorities of other  Contracting States in compliance with Annex 8

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- STC holder shall hold a DOA or Design Configuration Control
- Authority will not grant a STC if it has not accepted the foreign aircraft TC by the relevant authority of the State of Design in accordance with Subpart A.
- must show that the changed product complies with the applicable airworthiness design standard (Para 21.755)
- must show compliance by ensuring the change product complies with applicable design standard (Para 21.355)
- STC applicant must ensure they produce and maintain current the manuals
- STC applicant must ensure continued airworthiness by preparing variation to the instructions and make them available to all known operators
- Record keeping requirements

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- Authority's grant of Approval of a repair design.

- Repair design approval required when damage is beyond the limit of the manufacturer’s publication

- Under this Sub-Part, major repair cannot be performed without Authority Approval

- Minor repair can be performed without Authority Approval provided they are holder of DOA

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Airworthiness Design  Standards adopted by Authority for.

products

Certain parts, processes and appliances under STSO

Standards parts, materials and processes

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Restoration of product or article to an
airworthy condition to ensure that the product or article continues to comply with the appropriate airworthiness design standards used during its certification, after it has been damaged or subject to wear.

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Major required CAAS - SG
Minor required DOA, authority
- STC holder shall hold a DOA or Design Configuration Control

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Repairs and Airworthiness Design Standard (RADS)

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Repairs and Airworthiness Design Standard (RADS)

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Maintain close collaboration between design and production to unsure integrity of product and article
- DOA holder is responsible to provide up to date data to POA holder and statement which is approved by authority
- Privilege's of POA holder.
- Develop design data
- Issue statement of airworthiness design standard

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- approve minor design change
- enter intro arrangement for production
- mark article with STSO marking

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original TC is amended to include new Variant.
Accepted Under Sub part A

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>= 1 remanufactured to the new propsed design

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>= 1 remanufactured to the new propsed design

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Subjected to test flights.

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Design Control systems requirement for DOA holder.
- Defines each approved design & design change

-Documents compliance and ensures no unsafe design feature

- Identifies staff authorized to certify design data.

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Minimum performance standard issued by US National Aviation Authority for Materials, parts, processes and appliances used on aircraft.

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Beyond the authority of Service Bulletins (SB) will reuiqre the TC to be amended.
Accepted Under Sub Part C

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>Holder must establish quality procedure - ensure articles produced is in conformity with design data, no unsafe features and operated safely
>Comply with STSO marking and record keeping requirement
>No. of items produced limited to no more than 5 and articles are extremely simple
>Must marked in accordance to Subpart J

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Must be signed by accountable manager before it can be submitted to the Authority for approval

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- minor changes to the article > no need approval > notify CAAS within 6 months
- major changes require authority approval & new STSO certificate of approval

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Sub sec 2 _ Sub part B

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Maintain an Exposition Document which provides structure overview of the organization and procedures to ensure compliance with the sub part.

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- Design approval that meets airworthiness standard
- Cert of approval will not be issued when applicant is from outside of SG
- DOA not compulsory for STSO design approval

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- FAA - issed TC where USA Design
- EASA issed TC where member of EU Design

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Limited production only
Satisfy authority that each product or article will be produce satisfactorily
Demonstrate compliance with the applicable requirement in this Subpart

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The requirements to apply. (refer to
AMC 21.660). Annual fee charged
by CAAS for the grant of DOA.
$1100 per annum for each branch.

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TC, STC, Approval for
modifications and repair, STSO
certificate of approval requires
DOA.

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Sub Sec 2 _ Sub part A
Including Type design, the operating limitations, the type certificate data sheet (TCDS), the applicable regulation, and other conditions or limitations prescribed by the regulating categorizes.

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- maintain & keep record for 2 years after date of cessation of production of STSO articles
- kept including complete & current technical data if each STSO article sand inspection record

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(STSO) Singapore Technical Standard Order

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(STSO) Singapore Technical Standard Order