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Normal-Category Aeroplanes (CS-23) · CS-23 · EAR revision 13 May 2026
IRImplementing rule
(a)The installed powerplant must operate without any hazardous characteristics during normal and emergency operation within the range of operation limitations for the aeroplane and powerplant installation.
(b)The design must allow the shutdown and restart of the powerplant in flight within an established operating envelope.
IR · CS 23.2425 — CS-23 · ED Decision 2017/013/R · CS-23 Easy Access Rules · EAR revision 13 May 2026
AMCAcceptable means of compliance
ASTM F44 F3264 Standard Specification for Normal Category Aeroplanes Certification
8.6 Powerplant Operational Characteristics F3062/F3062M-20 Standard Specification for Aircraft Powerplant Installation F3064/F3064M-21 Standard Specification for Aircraft Powerplant Control, Operation, and Indication F3065/F3065M-21a Standard Specification for Aircraft Propeller System Installation F3066/F3066M-18 Standard Specification for Aircraft Powerplant Installation Hazard Mitigation F3117/F3117M-24a Standard Specification for Crew Interface in Aircraft
Remarks ASTM F44 published standards for showing compliance for electric propulsion systems. EASA has not yet accepted F3239-22a; 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]
AMC · AMC1 23.2425 — CS-23 · ED Decision 2026/003/R · CS-23 Easy Access Rules · EAR revision 13 May 2026
AMCAcceptable means of compliance
CS-23 Amdt 4
23.903(b), (d) through (g) Engines
23.905(c) Propellers
23.909(a) Turbocharger systems
23.934 Turbojet and turbofan engine thrust reverser systems tests
23.939 Turbopropeller-drag limiting systems
23.943 Negative acceleration
23.1142 Auxiliary power unit controls
23.1145 Ignition switches
23.1165 Engine ignition systems
AMC · AMC2 23.2425 — CS-23 · ED Decision 2017/025/R · CS-23 Easy Access Rules · EAR revision 13 May 2026
AMCAcceptable means of compliance
CS VLA Amdt 1 VLA.903 Engine VLA.905 Propeller VLA.909 Supercharger VLA.943 Negative acceleration VLA.1145 Ignition switches VLA.1165 Engine ignition systems
AMC · AMC3 23.2425 — CS-23 · ED Decision 2017/025/R · CS-23 Easy Access Rules · EAR revision 13 May 2026
Consolidated from the EASA Easy Access Rules (revision 13 May 2026, extracted 17 Aug 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.
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