ETSO-C7d

• ED Decision 2003/10/RM found in: CS-ETSO Amdt 17 - European Technical Standard Orders (Oct 2026)

#### ETSO-C7d *ED Decision 2003/10/RM* ##### **Direction Instrument, Magnetic Non-stabilized Type (Magnetic** **Compass)** **1 Applicability** This ETSO gives the requirements which new models of direction instruments, magnetic non- stabilized type (magnetic compass) 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: AS 398A „Direction Instrument, Magnetic Non-Stabilized Type (Magnetic Compass)“, dated July 15, 1958 „reaffirmed October 1984“ (if TSO) except as amended and supplemented by this ETSO: (i) Conformance with the following paragraphs of AS 398A is not required: 3.1; 3.1.1; 3.1.2; 3.2. (ii) Substitute the following for paragraph 7 of AS 398A: „Performance tests: the following tests in addition to any others deemed necessary by the manufacturers, shall be the basis for determining compliance with the performance requirements of this standard.“ 3.1.2 Environmental Standard The environmental conditions and test procedures in SAE AS 398A are to be used. 3.1.3 Computer Software None 3.2 Specific None **4 Marking** 4.1 General Marking is detailed in CS-ETSO Subpart A. 4.2 Specific None. **5 Availability of Referenced Document** See CS-ETSO Subpart A paragraph 3.