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21.A.608 Declaration of Design and Performance (DDP)

Annex I · Regulation (EU) No 748/2012 · EAR revision 27 Nov 2025

IRImplementing rule

21.A.608Declaration of Design and Performance (DDP)

(a)The DDP shall contain at least the following information:

1.information corresponding to point 21.A.31(a) and (b), identifying the article and its design and testing standard;

2.the rated performance of the article, where appropriate, either directly or by reference to other supplementary documents;

3.a statement of compliance certifying that the article has met the appropriate ETSO;

4.reference to relevant test reports;

5.reference to the appropriate Maintenance, Overhaul and Repair Manuals;

6.the levels of compliance, where various levels of compliance are allowed by the ETSO;

7.list of deviations accepted in accordance with point 21.A.610.

(b)The DDP shall be endorsed with the date and signature of the holder of the ETSO authorisation, or its authorised representative.

IR · 21.A.608 — Regulation (EU) No 748/2012 · Initial Airworthiness Easy Access Rules · EAR revision 27 Nov 2025

AMCAcceptable means of compliance

AMC 21.A.608Declaration of Design and Performance

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STANDARD FORM

DDP No. ………………………………………………………………

ISSUE No. ……………………………………………………….

1.Name and address of manufacturer.

2.Description and identification of article including: Type No Modification Standard Master drawing record Weight and overall dimensions

3.Specification reference, i.e., ETSO No. and Manufacturer’s design specification.

4.The rated performance of the article directly or by reference to other documents.

5.Particulars of approvals held for the equipment.

6.Reference to qualification test report.

7.Service and Instruction Manual reference number.

8.Statement of compliance with the appropriate ETSO and any deviations therefrom.

9.A statement of the level of compliance with the ETSO in respect of the ability of the article to withstand various ambient conditions or to exhibit various properties.

The following are examples of information to be given under this heading depending on the nature of the article and the specifications of the ETSO.

(a)Environmental Qualification i. Temperature and Altitude ii. Temperature Variation iii. Humidity iv. Operational Shocks and Crash Safety v. Vibration vi. Explosion Proofness vii. Waterproofness viii. Fluids Susceptibility ix. Sand and Dust x. Fungus Resistance xi. Salt Spray xii. Magnetic Effect xiii. Power Input xiv. Voltage Spike xv. Audio Frequency Conducted Susceptibility - Power Inputs xvi. Induced Signal Susceptibility xvii. Radio Frequency Susceptibility (Radiated and Conducted) xviii. Emission of Radio Frequency Energy xix. Lightning Induced Transient Susceptibility xx. Lightning Direct Effects xxi. Icing xxii. Electrostatic Discharge xxiii. Fire, Flammability (Note: The manufacturer should list environmental categories for each of the sections of the issue of EUROCAE ED-14/RTCA DO-160 that was used to qualify the article.)

(b)For radio transmitters the transmitting frequency band, maximum transmitting power, and emission designator.

(c)Working and ultimate pressure or loads.

(d)Time rating (e.g., continuous, intermittent) or duty cycle.

(e)Limits of accuracy of measuring instruments.

(f)Any other known limitations which may limit the application in the aircraft e.g., restrictions in mounting attitude.

10.A statement of the software level(s) used or ‘None’ if not applicable. (Note: Software levels (software development assurance levels (DAL)) are those defined in the industry document referred in the latest edition of AMC 20-115)

11.A statement of design assurance level for complex hardware or a statement indicating whether complex hardware is embedded or not in the product. (Note: Complex hardware design assurance levels are those defined in the applicable issue of EUROCAE ED–80/RTCA DO-254.)

12.The declaration in this document is made under the authority of

…………………………………………………………………………………………..(name of manufacturer) (Manufacturer’s name) cannot accept responsibility for equipment used outside the limiting conditions stated above without their agreement.

Date: ………….Signed………………………………………….....(Manufacturer’s authorised representative)

AMC · AMC 21.A.608 — Regulation (EU) No 748/2012 · ED Decision 2012/020/R · Initial Airworthiness Easy Access Rules · EAR revision 27 Nov 2025

All rules in SECTION A — TECHNICAL REQUIREMENTS

Consolidated from the EASA Easy Access Rules (revision 27 Nov 2025, extracted 17 Aug 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.

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