ETSO-C174 A1

• ED Decision 2013/012/R found in: CS-ETSO Amdt 17 - European Technical Standard Orders (Oct 2026)

#### ETSO-C174 A1 *ED Decision 2013/012/R* ##### Battery-based Emergency Power Unit (BEPU) **1 Applicability** This ETSO gives the requirements which Battery based Emergency Power Units (BEPU) that are manufactured on or after the date of this ETSO must meet in order to be identified with 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 are given in [Appendix 1](#_DxCrossRefBm920220919). Note: The battery used in the BEPU must meet the requirements of [ETSO-C173](#_DxCrossRefBm920220915) "Nickel-Cadmium and Lead Acid Batteries" or any other battery standards acceptable to the Agency. 3.1.2 Environmental standard As stated in Appendix 1, chapter 2, of this ETSO. 3.1.3 Software See CS-ETSO, Subpart A, paragraph 2.2. 3.1.4 Airborne electronic hardware See CS-ETSO, Subpart A, paragraph 2.3. 3.2 Specific 3.2.1 Failure condition classification See CS-ETSO, Subpart A, paragraph 2.4. **4 Marking** 4.1 General Marking is detailed in CS-ETSO, Subpart A, paragraph 1.2. 4.2 Specific Product label shall indicate: — battery capacity (e.g. 20 Amp-Hour (Ah)), — nominal voltage, — battery chemistry. **5 Availability of referenced document** See CS-ETSO, Subpart A, paragraph 3 [Amdt ETSO/3] [Amdt ETSO/8]