ETSO-C112e

• ED Decision 2016/013/R found in: CS-ETSO Amdt 17 - European Technical Standard Orders (Oct 2026)

#### ETSO-C112e *ED Decision 2016/013/R* ##### Secondary Surveillance Radar Mode S Transponder **1 Applicability** This ETSO provides the requirements which Secondary Surveillance Radar Mode S Transponder that are designed and 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](#_DxCrossRefBm920220672). 2.2 Specific None. **3 Technical Conditions** 3.1 Basic 3.1.1 Minimum Performance Standard Standards set forth in the EUROCAE ED-73E, Minimum Operational Performance Standards for Secondary Surveillance Radar Mode S Transponders, dated May 2011 as amended by [Appendix 1](#_DxCrossRefBm920220812) to this ETSO. Note: Level 2 transponders are expected to comply with the Overlay Command Capability as per ED-73E section 3.23.1.12 and 3.18.4.40. 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. 3.1.4 Electronic Hardware Qualification See CS-ETSO, Subpart A, paragraph 2.3. 3.2 Specific None. 3.2.1 Failure Condition Classification See CS-ETSO, Subpart A, paragraph 2.4. Failure of the function defined in paragraph 3.1.1 of this ETSO resulting in misleading information is a major failure condition. Failure of the function defined in paragraph 3.1.1 of this ETSO resulting in loss of function is a minor failure condition. **4 Marking** 4.1 General Marking as detailed in CS-ETSO, Subpart A, paragraph 1.2. 4.2 Specific The marking must also include the transponder’s functional level and optional additional features as provided in ED-73E, Section 1.4.2.2, as well as minimum peak output power identified by the transponder class as defined in ED-73E, Section 1.4.2.4. **5 Availability of Referenced Document** See CS-ETSO, Subpart A, paragraph 3. [Amdt ETSO/11]