Navigate / EASA
AMC 21.A.608 Declaration of Design and Performance

ED Decision 2012/020/R

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)