ETSO-C56b A1

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

#### ETSO-C56b A1 *ED Decision 2013/012/R* ##### **Engine-driven Direct Current Generators/Starter-generators** **1 Applicability** This ETSO gives the requirements which engine-driven direct current generators/starter-generators 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](#_DxCrossRefBm920220672). 2.2 Specific None. **3 Technical conditions** 3.1 Basic 3.1.1 Minimum performance standard Standards set forth in the SAE Aerospace Standard (AS) document: AS8020, "Engine Driven D.C. Generators/Starter-Generators and Associated Voltage Regulators", dated January 1980 (and reaffirmed by SAE in August 1991). 3.1.2 Environmental standard See CS-ETSO, Subpart A, paragraph 2.1. 3.1.3 Software If the Engine Driven Direct Current Generator / Starter Generator and the associated voltage regulators include a digital computer, see CS-ETSO, Subpart A, Paragraph 2.2, for software development. 3.1.4 Airborne electronic hardware See CS-ETSO, Subpart A, paragraph 2.3. 3.2 Specific None. **4 Marking** 4.1 General Marking is detailed in CS-ETSO, Subpart A, paragraph 1.2. 4.2 Specific In addition to the information specified in §4.1, the following information is required: (1) Means of indicating if the article is a D.C. generator or a D.C. starter-generator; (2) Nominal power output (electrical voltage and watts); (3) Mechanical power input requirements (pad requirements). **5 Availability of referenced document** See CS-ETSO, Subpart A, paragraph 3. [Amdt ETSO/3] [Amdt ETSO/8]