--- title: "ETSO-C96c A1 — CS-ETSO · Avioverse" description: "Anticollision Light Systems 1 Applicability This ETSO provides the requirements that anticollision light systems that are designed and manufactured on or…" url: "https://avioverse.aero/regulations/easa/cs-etso/subpart-b/etso-c96c" --- # ETSO-C96c A1 European Technical Standard Orders (CS-ETSO) · CS-ETSO · EAR revision 1 Oct 2026 IR Implementing rule ## ETSO-C96c A1 Anticollision Light Systems 1 Applicability This ETSO provides the requirements that anticollision light systems 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 standard is that provided in Society of Automotive Engineers, Inc., (SAE) Aerospace Standard AS8017D ‘Minimum Performance Standard for Anticollision Light Systems’, dated August 2017, as modified by Appendix 1 to this ETSO. 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. 3.2.2 Others Note: AS8017D does not reflect the impact of updates to Certification Specifications published after 15 August 2017, such as CS-23 Amendment 5. 4 Marking 4.1 General See CS-ETSO, Subpart A, paragraph 1.2. 4.2 Specific The following information shall be legibly and permanently marked on the major equipment components: (a) Class I, II, III or IV (refer to SAE AS8017D and Appendix 1 to this ETSO). (b) Nominal power input rating. 5 Availability of Referenced Document See CS-ETSO, Subpart A, paragraph 3. \[Amdt ETSO/13] \[Amdt ETSO/17] \[Amdt ETSO/18] IR · ETSO-C96c — CS-ETSO · CS-ETSO Easy Access Rules · EAR revision 1 Oct 2026 Appendix Appendix ## Appendix 1 to ETSO-C96c A1 — ANTICOLLISION LIGHT SYSTEMS A.1 In Section 1.2 of SAE Aerospace Standard AS8017D ‘Minimum Performance Standard for Anticollision Light Systems’, dated August 2017, below the row defining Class III, add a new row defining Class IV: ‘Class IV — Fixed Wing Aircraft 400 Candelas with reduced elevation angle.’ Below the lines defining the different classes in Section 1.2 of SAE AS8017D ‘Minimum Performance Standard for Anticollision Light Systems’, dated August 2017, add the following: ‘The requirements for a Class IV anticollision light system are as for a Class II anticollision light system, except that there is no intensity requirement for angles above or below the horizontal plane which are greater than 30°.’ A.2 In Section 1.2.1 of SAE Aerospace Standard AS8017D ‘Minimum Performance Standard for Anticollision Light Systems’, dated August 2017, remove the statement: ‘Anticollision lights for fixed wing aircraft must meet requirements for Class III lights if certificated prior to August 11, 1971, and the requirements for Class II lights if certificated after that date.’ A.3 In Section 3.1, add a new Section 3.1.4, ‘Effective Intensity Variation’, containing the following text: ‘For any angle (up to 30°) above or below the horizontal plane, the difference between the minimum and maximum effective intensity for different azimuths shall be less than 25 % of the maximum intensity.’ A.4 In Section 3.2, add a new Section 3.2.4, ‘Effective Intensity Variation’, containing the following text: ‘For any angle (up to 75°) above or below the horizontal plane, the difference between the minimum and maximum effective intensity for different azimuths shall be less than 25 % of the maximum intensity.’ A.5 In Section 3.3, add a new Section 3.3.4, ‘Effective Intensity Variation’, containing the following text: ‘For any angle (up to 30°) above or below the horizontal plane, the difference between the minimum and maximum effective intensity for different azimuths shall be less than 25 % of the maximum intensity.’ A.6 In Section 3.4 of SAE Aerospace Standard AS8017D ‘Minimum Performance Standard for Anticollision Light Systems’, dated August 2017, replace the statement: ‘Caution: compliance only to the alternate colour definitions detailed in Section 3.4.1 (without compliance to the CFR requirements) will require an Equivalent Level of Safety Finding by the Federal Aviation Administration in order to allow installation of the lights on certified aircraft.’ With the following revised statement: ‘Caution: compliance only to the alternate colour definitions detailed in Section 3.4.1 (without compliance to the CS requirements) may require an Equivalent Level of Safety Finding in order to approve the installation of the lights on certified aircraft.’ \[Amdt ETSO/17] \[Amdt ETSO/18] APPENDIX · Appendix 1 to ETSO-C96c — CS-ETSO · CS-ETSO Easy Access Rules · EAR revision 1 Oct 2026 [All rules in SUBPART B – LIST OF ETSOs](https://avioverse.aero/regulations/easa/cs-etso/subpart-b) Consolidated from the EASA Easy Access Rules (revision 1 Oct 2026, extracted 13 Oct 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.