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ETSO-C109

European Technical Standard Orders (CS-ETSO) · CS-ETSO · EAR revision 14 Aug 2026

IRImplementing rule

ETSO-C109

AIRBORNE NAVIGATION DATA STORAGE SYSTEM

1 Applicability

This ETSO gives the requirements which airborne navigation data storage systems that are manufactured on or after the date of this ETSO must meet in order to be identified with the applicable ETSO marking.

2 Procedures

- 2.1 General

Applicable procedures are detailed in CS-ETSO Subpart A.

- 2.2 Specific

None.

3 Technical Conditions

- 3.1 Basic

- 3.1.1 Minimum Performance Standard

Standards set forth in the Global Systems, Inc., document 'Minimum Performance Standard for the Airborne Navigation Data Storage Systems', dated March 31 1983.

- 3.1.2 Environmental Standard

See CS-ETSO Subpart A paragraph 2.1.

- 3.1.3 Computer Software

See CS-ETSO Subpart A paragraph 2.2.

- 3.2 Specific

None

4 Marking

- 4.1 General

Marking is detailed in CS-ETSO Subpart A paragraph 1.2.

- 4.2 Specific

None

5 Availability of Referenced Document

See CS-ETSO Subpart A paragraph 3.

ED Decision 2003/10/RM

IR · ETSO-C109 — CS-ETSO · CS-ETSO Easy Access Rules · EAR revision 14 Aug 2026

All rules in SUBPART B -LIST OF ETSOS

Consolidated from the EASA Easy Access Rules (revision 14 Aug 2026, 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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