CS-E 40 Ratings

• ED Decision 2018/014/R found in: CS-E Amdt 5 - Engines (Dec 2018)

CS-E 40 Ratings ED Decision 2018/014/R (See [AMC E 40](#_DxCrossRefBm1371447621)) (a) Power ratings must be established for Take-off Power and/or Thrust and for Maximum Continuous Power and/or Thrust, for all Engines. (b) Other ratings may also be established as - (1) Piston Engines - (i) Maximum Recommended Cruising Power, (ii) Maximum Best Economy Cruising Power; (2) Turbine Engines for multi-engined aeroplanes: (i) 2 1/2-Minute OEI Power or Thrust, (ii) Continuous OEI Power or Thrust; (3) Turbine Engines for multi-engined rotorcraft (see [AMC E 40(b)(3)](#_DxCrossRefBm1371447589)): (i) 30-Second OEI Power, (ii) 2-Minute OEI Power, (iii) 2 1/2-Minute OEI Power, (iv) 30-Minute OEI Power, (v) Continuous OEI Power; (4) Turbine Engines for Rotorcraft: (i) 30-Minute Power. (c) The Engine Thrust and/or Power ratings will be based on standard atmospheric conditions, with no air bleed for aircraft services and with only those accessories installed which are essential for Engine functioning, including controls, unless otherwise declared in the Engine type certificate data sheet. (d) Operating limitations appropriate to the intended operating conditions for the Engine must be established (see [AMC E 40(d)](#_DxCrossRefBm1371447620)). (e) The Engine’s rated Powers/Thrusts and any operating limitations established under this CS-E 40 which must be respected by the crew of an aircraft must be listed in the Engine type certificate data sheet specified in 21.A.41. The Engine type certificate data sheet must also identify, or make reference to, all other information found necessary for the safe operation of the Engine. (f) The ratings established under this CS-E 40 must be defined for the lowest Power/Thrust that all Engines of the same type may be expected to produce under the conditions used to determine these ratings. The minimum testing must be defined, together with associated conditions, necessary for ensuring that the Engines will comply with this objective. (g) In determining the Engine performance and operating limitations, the overall limits of accuracy of the Engine Control System and of the necessary instrumentation as defined in [CS-E 60(b)](#_DxCrossRefBm1371447588) must be taken into account. (h) For Piston Engines, each declared rating must be defined in terms of the power produced at a given power setting and Engine rotational speed. [Amdt No: E/1] [Amdt No: E/5]