European Technical Standard Approval

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The European Technical Standard Order ( English European Technical Standard Order , ETSO ) is a detailed airworthiness specifications for parts and appliances of aircraft .

European Technical Standard Order authorizations will be from the European Aviation Safety Agency issued (European Aviation Safety Agency, EASA) and thus apply primarily for equipment of civil, commercial aviation within the EU ; they are to be observed when designing components and equipment for aircraft. Based on this specification , EASA approvals according to European Technical Standard Approval (ETSO approvals) can be issued for individual constructions.

background

The European aviation law differs regarding aviation equipment between products (Engl. Products ) as well as parts and equipment (Engl. Parts and appliances ); all of these devices require approval “according to the standards and procedures of the Chicago Convention ”. Products - according to the understanding of European aviation law, aircraft as well as their engines and propellers - require a type approval according to Sections B, D and E of Annex I (Part 21) of EU Regulation No. 748/2012 (this procedure differs from the process to obtain an ETSO approval). Parts and equipment are defined as instruments, devices, mechanisms, devices, fittings or accessories including communication devices which are used for the operation or control of an aircraft in flight operations. This also includes parts of the aircraft cell, an engine or a propeller. The procedure for the approval of the construction of such parts and equipment - the ETSO approval procedure - is defined in Section O of Annex I (Part 21) of EU Regulation No. 748/2012.

Since European aviation law was largely derived from US aviation law, the ETSO certification procedure was also based on the US TSO certification procedure .

Admission process

In order for the construction of an aircraft part or of equipment for aviation according to Section O of Annex I (Part 21) of EU Regulation No. 748/2012 to be approved, it must meet the requirements of the CS-ETSO airworthiness specification. This forms a basis for the development of such parts and equipment (ETSO article).

When applying for ETSO approval, a development company for ETSO articles must prove to EASA that it has the necessary structures, knowledge and skills, and that its design meets the requirements of the ETSO to be applied. For the development of auxiliary turbines , the company must be approved as a development company in accordance with Section J of Part 21; for all other ETSO articles it is sufficient if it can prove by means of procedural documents that it complies with the specific design practice required in Part 21. In practice, this means that he works according to the specifications for development companies according to Section J of Part 21, but does not have to be certified accordingly.

If the development company proves that it meets the requirements of Part 21 and its design meets the requirements of the applicable ETSO, it receives an ETSO approval from EASA and is therefore the holder of this approval, combined with the corresponding obligations.

specification

The individual ETSOs are summarized in the airworthiness specification CS-ETSO. This is issued by EASA and is divided into two sections; Section A with general specifications on environmental and software standards as well as Section B with a list of the item-related individual specifications. There are a total of 91 ETSOs, the content of which is similar to that of the corresponding FAA -TSOs, as well as 22 other ETSOs, the content of which either differs significantly from the TSOs or for which there are no US equivalents (status: first edition CS-ETSO from 24 October 2003).

In the main, the individual ETSOs refer to further specifications, e.g. B. Documents of EUROCAE , RTCA , SAE and MIL standards.

Web links

Individual evidence

  1. ↑ cf. Art. 1 No. 2 lit. g Commission Regulation (EU) No. 748/2012 of 3 August 2012
  2. ↑ cf. Art. 3 lit. c and d Regulation (EC) No. 216/2008 of the European Parliament and Council of February 20, 2008
  3. ↑ cf. Preamble No. 7 Sentence 1 Regulation (EC) No. 216/2008 of the European Parliament and Council of February 20, 2008
  4. ↑ cf. Art. 3 lit. d Regulation (EC) No. 216/2008 of the European Parliament and Council of February 20, 2008
  5. ↑ Filippo de Florio: Airworthiness - An Introduction to Aircraft Certification , Butterworth-Heinemann London 2011, ISBN 978-0-08-096802-5 , p. 58
  6. ↑ cf. 21.A.602B Annex I (Part 21) of Regulation (EU) No. 748/2012
  7. ↑ cf. 21.A.609 Annex I (Part 21) of Regulation (EU) No. 748/2012