AMC No 2 to 21.A.263(c)(1) Privileges – Organisations that design minor changes to a type certificate (TC) or a supplemental type certificate (STC) and minor repairs to products: classification procedure    

CAA ORS9 Decision No. 1

1. Content

The procedure should address the following points:

— configuration control rules, especially the identification of changes to a TC, APU UKTSO or to that part of the product covered by an STC, and repair designs;

— classification in compliance with point 21.A.91 and considering GM 21.A.91 for changes and GM 21.A.435 for repairs;

— justification of the classification;

— authorised signatories.

2. Identification of changes to a TC, APU UKTSO or to that part of the product covered by an STC, and repair designs

The procedure should indicate how the following minor changes to a TC or minor repairs are identified:

— those minor design changes to a TC or minor repairs where additional substantiation data is necessary to demonstrate compliance with the CS or environmental protection requirements;

— other minor design changes to a TC or minor repairs that require no further demonstration of compliance.

3. Classification

The procedure should show how the effects on airworthiness as well as on operational suitability and environmental protection are analysed, from the very beginning, by reference to the applicable requirements.

If no specific requirements are applicable to the change or the repair, the above review should be done at the level of the part or system where the change or repair is integrated and where specific CS or environmental protection requirements are applicable.

For repair, see also GM 21.A.435.

4. Justification of the classification

All decisions on the classification of changes to a TC, APU UKTSO or to that part of the product covered by an STC, and repair designs as ‘minor’ should be recorded and, for those which are not straightforward, also documented.

These records should be easily accessible to the CAA for sample checking. It may be in the format of meeting notes or a register.

5. Authorised signatories

All classifications of changes to a TC, APU UKTSO or to that part of the product covered by an STC, and repair designs should be accepted by an appropriately authorised signatory.

The procedure should indicate the authorised signatories for the various products listed in the terms of approval.