ED Decision 2022/018/R
1 Applicability
This ETSO provides the requirements that aircraft circuit breakers 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
The 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
The applicable standards are those provided in Table 1 for the intended equipment class:
Table 1 — Equipment class standards
Equipment Class |
Equipment Type |
Minimum Performance Standards |
1 |
Alternating Current (AC) Arc Fault Circuit Breakers |
SAE Aerospace Standard (AS) AS5692A, ‘ARC Fault Circuit Breaker (AFCB), Aircraft, Trip-Free Single Phase and Three Phase 115 VAC, 400 Hz - Constant Frequency’, dated December 2009 |
2 |
Direct Current (DC) Arc Fault Circuit Breakers |
SAE Aerospace Standard (AS) AS6019, ‘ARC Fault Circuit Breaker (AFCB), Aircraft, Trip-Free 28 VDC’, dated June 2012 |
3 |
AC or DC Thermal Circuit Breakers |
SAE
Aerospace Standard (AS) AS58091A, ‘Circuit Breakers,
|
3.1.2 Environmental Standard
See CS-ETSO, Subpart A, paragraph 2.1.
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
See CS-ETSO, Subpart A, paragraph 1.2.
4.2 Specific
The class of the equipment shall be legibly and permanently marked.
5 Availability of referenced documents
See CS-ETSO, Subpart A, paragraph 3.
[Amdt ETSO/8]
ETSO-C178a specifies minimum performance standards for aircraft circuit breakers, requiring compliance with SAE standards for AC/DC arc fault and thermal types, plus legible permanent class marking.
* Summary by Aviation.Bot - Always consult the original document for the most accurate information.
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