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Navigate / EASA / INITIAL AIRWORTHINESS AND ENVIRONMENTAL PROTECTION NOV 2025 / Annex Ib / SECTION A - TECHNICAL REQUIREMENTS / SUBPART F -- CHANGES TO AIRCRAFT FOR WHICH DESIGN COMPLIANCE HAS BEEN DECLARED / 21L.A.108 Compliance activities for declaring compliance of a major change / AMC1 21L.A.108(a) Compliance activities for declaring compliance of a major change /

Appendix A to AMC1 21L.A.108(a) Compliance activities for declaring compliance of a major change

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Appendix A to AMC1 21L.A.108(a) Compliance activities for declaring compliance of a major change

ED Decision 2023/013/R

MEANS-OF-COMPLIANCE CODES

Type of compliance

Means of compliance

Associated compliance documents

Engineering evaluation

MC0:

(a) compliance statement

(b) reference to design data

(c) election of methods, factors, etc.

(d) definitions

(a) Design data

(b) Recorded statements


MC1: design review


(c) Descriptions

(d) Drawings

MC2: calculation/analysis

(e) Substantiation reports

MC3: safety assessment

(f) Safety analyses

Tests

MC4: laboratory tests

(g) Test programmes

(h) Test reports

(i) Test interpretations

MC5: ground tests on related product(s)

MC6: flight tests

MC8: simulation

Inspection

MC7: design inspection/audit

(j) Inspection or audit reports


Equipment qualification


MC9: equipment qualification

Note: Equipment qualification is a process that may include all previous means of compliance at equipment level.



Frequently Asked Questions

MC2: calculation/analysis is categorized under 'Engineering evaluation' and includes substantiation reports (item (e)).

* Aviation.Bot's Suggestion - Always consult the original regulation for confirmation

The means of compliance are MC0 (compliance statement), MC1 (design review), MC2 (calculation/analysis), MC3 (safety assessment), MC4 (laboratory tests), MC5 (ground tests on related product(s)), MC6 (flight tests), MC8 (simulation), MC7 (design inspection/audit), and MC9 (equipment qualification).

* Aviation.Bot's Suggestion - Always consult the original regulation for confirmation

MC3: safety assessment is associated with safety analyses (item (f) in the table).

* Aviation.Bot's Suggestion - Always consult the original regulation for confirmation

MC4: laboratory tests is associated with test programmes, test reports, and test interpretations (items (g), (h), and (i)).

* Aviation.Bot's Suggestion - Always consult the original regulation for confirmation

MC7: design inspection/audit is the means of compliance, and it is associated with inspection or audit reports (item (j)).

* Aviation.Bot's Suggestion - Always consult the original regulation for confirmation

The note states that equipment qualification is a process that may include all previous means of compliance at equipment level.

* Aviation.Bot's Suggestion - Always consult the original regulation for confirmation

MC0 is associated with design data and recorded statements (items (a) and (b)).

* Aviation.Bot's Suggestion - Always consult the original regulation for confirmation

MC5: ground tests on related product(s) falls under 'Tests'.

* Aviation.Bot's Suggestion - Always consult the original regulation for confirmation

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Details
Source-Title: Appendix A to AMC1 21L.A.108(a) Compliance activities for declaring compliance of a major change
Erulesid: ERULES-1963177438-21964
Domain: Initial airworthiness
Amendedby: Issue 1
Applicabilitydate: 21 October, 2023
Entryintoforcedate: 21 October, 2023
Regulatorysource: ED Decision 2023/013/R Navigate
Regulatorysubject: Part 21 Light
Typeofcontent: AMC to IR (Acceptable means of compliance to implementing rule)
Parentir: AMC1 21L.A.108(a) Compliance activities for declaring compliance of a major change
Origin: EASA
Category: EAR