Application for European Technical Standard Order (ETSOA)

Applications for ETSOA can also be submitted to EASA online via the EASA Applicant Portal.


E-mail: ETSOA [at] easa [dot] europa [dot] eu
Fax:+49 (0)221 89990 ext. 4458

European Aviation Safety Agency
Applications Handling Department
Postfach 10 12 53
D-50452 Köln

Acceptance of ETSOA/TSO

All new applications for validation of FAA TSOs received by EASA shall be dealt with as per the FAA-EASA Technical Implementation Procedure (TIP) rev. 5, paragraph 2.5 , as from 02 March 2016.

As of this date, EASA accepts applications for validation only for the following TSO articles that are not covered by reciprocal acceptance, as per TIP FAA-EASA rev. 5 subparagraph 2.5.2:

  • TSO/ETSO-C90 articles containing active components (ref. FAA Order 8150.4)
  • TSO-C153/ETSO-2C153 integrated modular avionics
  • TSO-C23 single harness emergency parachutes and all ETSO-C23 parachute equipment
  • TSO-C77/CS-APU auxiliary power units


EASA will not accept applications from USA for revisions to existing ETSO certificates for all articles.

Minor changes to TSOAs where a validated ETSOA exists are processed by the FAA and will be accepted as per the provisions of the TIP. Therefore the existing ETSOA certificates will not be revised.

For more information, please review the FAA/EASA coordinated FAQ on the subject (http://www.easa.europa.eu/document-library/bilateral-agreements/eu-usa#group-easa-downloads)

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