Page 22 - UK Regulation Part 21 Initial Airworthiness Annex I (consolidated) March 2022

PART 21 - INITIAL AIRWORTHINESS (ANNEX I)

Subpart J DOA by the addition of the missing elements.
1. Scope
1.1 A manual of procedures should be provided that sets out the specific design
practices, resources and the sequence of activities that are relevant for the specific
projects, taking the Part 21 requirements into account.
1.2 These procedures should be concise and limited to the information that is needed
for the quality and proper control of activities by the applicant/holder, and by the CAA.
2. Management of the (supplemental) type-certification process
2.1 Certification programme: see AMC 21.A.15(b) for type certification and AMC
21.A.93(b) for supplemental type certification.
2.2 Compliance demonstration: see GM 21.A.20.
2.3 Reporting: see GM 21.A.20(b).
2.4 Compliance documentation: see AMC 21.A.20(c).
2.5 Declaration of compliance: see GM 21.A.20(d).
3. Management of changes to type certificates, repair designs and production deviations
3.1 Management of changes to a type certificate or supplemental type certificate
(hereinafter referred to as ‘changes’), repair designs and production deviations from
the approved design data.
The applicant should provide procedures that are acceptable to the CAA for the
classification and approval of changes (see paragraphs 3.2 and 3.3), repair designs
and production deviations from the approved design data.
3.2 Classification
3.2.1 Content
The procedure should address the following points:
- the identification of the product configuration(s) to which the change is
to be made,
- the identification of the areas of the product that are changed or affected
by the change,
- the identification of any reinvestigations that are necessary (see point
21.A.93(b)(2)), including the identification of the applicable certification
specifications or environmental protection requirements and means of
compliance,
- changes initiated by subcontractors,
- documents to justify the classification,
- authorised signatories,
- the criteria used for classification must be in compliance with 21.A.91
and the corresponding interpretations.
3.2.2 Identification of changes
The procedure should indicate how the following are identified:
- major changes,
- those minor changes where additional work is necessary to
demonstrate compliance with the certification specifications,
- other minor changes that require no further demonstration of
compliance.
3.2.3 Considerations of effects of the change
The procedure should show how the effects on airworthiness, operational
suitability or environmental protection are analysed, from the very beginning,
by reference to the applicable certification specifications.
If no specific certification specifications are applicable to the change, the
above review should be carried out at the level of the part or system where the
change is integrated and where specific certification specifications are
applicable.
3.2.4 Control of changes initiated by subcontractors
The procedure should indicate, directly or by cross reference to written
procedures, how changes initiated by subcontractors are controlled.
3.2.5 Documents to justify the classification
All decisions of classification of changes should be documented and approved
by the CAA. The document may be in the format of meeting notes or a
register.
3.2.6 Authorised signatories
The procedure should identify the persons authorised to sign the proposed
classification before release to the CAA for approval.
3.3 Approval of changes
3.3.1 Content
The procedure should address the following points:
- compliance documentation,
- the internal approval process,
- authorised signatories.
3.3.2 Compliance documentation
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