AMC1 23.2500 General requirements on systems and equipment function

• ED Decision 2019/020/R found in: CS-23 Amdt 5 AMC-GM Issue 3 - Normal-Category Aeroplanes (Jul 2020)
• ED Decision 2023/002/R found in: CS-23 Amdt 6 AMC-GM Issue 4 - Normal-Category Aeroplanes (Mar 2023)
• ED Decision 2026/003/R found in: CS-23 Amdt 6 AMC-GM Issue 5 - Normal-Category Aeroplanes (May 2026)

AMC1 23.2500 General requirements on systems and equipment function ED Decision 2019/020/R ASTM F44 F3264-18b Standard Specification for Normal Category Aeroplanes Certification 9.1 Systems and Equipment Function and Safety Requirements: [F3061/F3061M-17](https://www.astm.org/Standards/F3061.htm) Standard Specification for Systems and Equipment in Small Aircraft [F3230-17](https://www.astm.org/Standards/F3230.htm) Standard Practice for Safety Assessment of Systems and Equipment in Small Aircraft [F3231/F3231M-17](https://www.astm.org/Standards/F3231.htm) Standard Specification for Electrical Systems in Small Aircraft [F3235-17a](https://www.astm.org/Standards/F3235.htm) Standard Specification for Electrical Storage Batteries in Small Aircraft [F3232/F3232M-17](https://www.astm.org/Standards/F3232.htm) Standard Specification for Flight Controls in Small Aircraft [F3233/F3233M-17](https://www.astm.org/Standards/F3233.htm) Standard Specification for Instrumentation in Small Aircraft [F3229/F3229M-17](https://www.astm.org/Standards/F3229.htm) Standard Practice for Static Pressure System Tests in Small Aircraft [F3309/F3309M-18](https://www.astm.org/Standards/F3309.htm) Standard practice for Simplified Safety Assessment of Systems and Equipment in Small Aircraft [F3064/F3064M-18a](https://www.astm.org/Standards/F3064.htm) Standard Specification for Aircraft Powerplant Control, Operation, and Indication [F3066/F3066M-18](https://www.astm.org/Standards/F3066.htm) Standard Specification for Aircraft Powerplant Installation Hazard Mitigation [F3117-18b](https://www.astm.org/Standards/F3117.htm) Standard Specification for Crew Interface in Aircraft [F3120-15](https://www.astm.org/Standards/F3120.htm) Standard Specification for Ice Protection for General Aviation Aircraft Remarks F3309 New F3064 revised from -15\* to -18a \* F3064-15 § 6.2.1 must be complemented. F3064-18 § 6.2.1.6 provides this AMC. F3066 revised from -15 to -18 F3117 revised from -15 to -18b F3120-15 added as AMC AMC1 23.2500 General requirements on systems and equipment function ED Decision 2023/002/R ASTM F44 F3264-21 Standard Specification for Normal Category Aeroplanes Certification 9.1     Systems and Equipment Function Requirements [F3061/F3061M-20](https://www.astm.org/Standards/F3061.htm) Standard Specification for Systems and Equipment in Small Aircraft [F3231/F3231M-21](https://www.astm.org/Standards/F3231.htm) Standard Specification for Electrical Systems for Aircraft with Combustion Engine Electrical Power Generation [F3235-17a](https://www.astm.org/Standards/F3235.htm) Standard Specification for Aircraft Storage Batteries [F3232/F3232M-20](https://www.astm.org/Standards/F3232.htm) Standard Specification for Flight Controls in Small Aircraft [F3233/F3233M-21](https://www.astm.org/Standards/F3233.htm) Standard Specification for Flight and Navigation Instrumentation in Aircraft [F3229/F3229M-17](https://www.astm.org/Standards/F3229.htm) Standard Practice for Static Pressure System Tests in Small Aircraft [F3064/F3064M-21](https://www.astm.org/Standards/F3064.htm) Standard Specification for Aircraft Powerplant Control, Operation, and Indication [F3066/F3066M-18](https://www.astm.org/Standards/F3066.htm) Standard Specification for Aircraft Powerplant Installation Hazard Mitigation [F3117-20](https://www.astm.org/Standards/F3117.htm) Standard Specification for Crew Interface in Aircraft [F3120/F3120M-20](https://www.astm.org/Standards/F3120.htm) Standard Specification for Ice Protection for General Aviation Aircraft [F3408/F3408M-21](https://www.astm.org/Standards/F3408.htm) Standard Specification for Aircraft Emergency Parachute Recovery Systems ASTM F44 published standards for showing compliance for electrical systems that are installed on aeroplanes with electric or hybrid-electric propulsion systems. EASA has not yet accepted [F3316-19](https://www.astm.org/f3316_f3316m-19.html); however, EASA would take into consideration applications from applicants that use this standard as the basis for the development of their means of compliance subject to agreement with EASA. EASA does not consider that [F3235-17a](https://www.astm.org/f3235-22.html) alone provides a complete means of compliance for electrical storage batteries in small aircraft (e.g. paragraph 4.2.1). Therefore, additional and complementary means of compliance should be developed and agreed with EASA for the specific application. ##### AMC1 23.2500 General requirements on systems and equipment function *ED Decision 2026/003/R* **ASTM F44 F3264 Standard Specification for Normal Category Aeroplanes Certification** *9.1* *Systems and Equipment Function Requirements* [F3231/F3231M-24](https://www.astm.org/Standards/F3231.htm) Standard Specification for Electrical Systems for Aircraft with Combustion Engine Electrical Power Generation [F3235-22](https://www.astm.org/Standards/F3235.htm) Standard Specification for Aircraft Storage Batteries [F3232/F3232M-25](https://www.astm.org/Standards/F3232.htm) Standard Specification for Flight Controls in Small Aircraft [F3233/F3233M-23b](https://www.astm.org/Standards/F3233.htm) Standard Specification for Flight and Navigation Instrumentation in Aircraft [F3229/F3229M-23a](https://www.astm.org/Standards/F3229.htm) Standard Practice for Static Pressure System Tests in Small Aircraft [F3064/F3064M-21](https://www.astm.org/Standards/F3064.htm) Standard Specification for Aircraft Powerplant Control, Operation, and Indication [F3066/F3066M-18](https://www.astm.org/Standards/F3066.htm) Standard Specification for Aircraft Powerplant Installation Hazard Mitigation [F3117/F3117M-24a](https://www.astm.org/Standards/F3117.htm) Standard Specification for Crew Interface in Aircraft [F3120/F3120M-20](https://www.astm.org/Standards/F3120.htm) Standard Specification for Ice Protection for General Aviation Aircraft [F3408/F3408M-21](https://www.astm.org/Standards/F3408.htm) Standard Specification for Aircraft Emergency Parachute Recovery Systems **Remarks** — [F3061/F3061M-24a](https://www.astm.org/Standards/F3061.htm) Standard Specification for Systems and Equipment in Small Aircraft At variance with F3061-24a, paragraph 4.4.2, use of system level verification is usually not acceptable, and it should be discussed with EASA. — [F3532-25](https://store.astm.org/f3532-25.html?_gl=1*1ywpnzn*_gcl_au*MTcyMzgwODA2Mi4xNzcyMDM1ODg5) Standard Practice for Protection of Aircraft Systems from Intentional Unauthorized Electronic Interactions At variance with F3532 and F3061-24a, paragraph 4.3, for showing compliance with [CS 23.2500(b)](#_DxCrossRefBm470704083) for equipment and systems whose improper functioning could lead to an intentional unauthorised electronic interaction (IUEI) — For an aeroplane with assessment level IV, the applicant may consider AMC 20-42. — For an aeroplane with assessment level I, level II or level III, the applicant may consider ASTM F3532-25. For an aeroplane with certification level 1, operated in visual flight rules (VFR) day or night, considerations of cybersecurity threats as potential sources of improper functioning of the equipment and systems are not required. ASTM F44 published standards for showing compliance for electrical systems that are installed on aeroplanes with electric or hybrid-electric propulsion systems. EASA has not yet accepted [F3316-19](https://www.astm.org/f3316_f3316m-19.html); however, EASA would take into consideration applications from applicants that use this standard as the basis for the development of their means of compliance subject to agreement with EASA. [AMC & GM to CS-23: Issue 4] [AMC & GM to CS-23: Issue 5]