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SUBPART A – GENERAL

Engines (CS-E) · CS-E

  1. AMC General

    In addition to the acceptable means of compliance in Book 2 of these Certification Specifications, AMC-20 may also provide acceptable means of compliance…

  2. CS-E 10 Applicability

    This CS-E contains airworthiness specifications for the issue of type certificates, and changes to those certificates, for Engines, in accordance with…

  3. AMC E 10(b) Thrust Reversers

    If a thrust reverser is declared as being part of the Engine type design under CS-E 20(a), it should comply with all appropriate CS-E specifications and…

  4. CS-E 15 Terminology

    The terminology of this CS-E 15 must be used in conjunction with the issue of CS-Definitions current at the date of issue of this CS-E.

  5. CS-E 20 Engine Configuration and Interfaces

    (See AMC E 20) (a) The list of all the parts and equipment, including references to the relevant drawings, which defines the proposed type design of the…

  6. AMC E 20 Engine Configuration and Interfaces

    The components and equipment listed in the Engine type design (see CS-E 20(a)) should include those items necessary for the satisfactory functioning and…

  7. AMC E 20(f) Power assurance data for engines with one or more OEI power ratings

    For Engines having one or more OEI ratings, the applicant should provide in the instructions for installation the necessary Engine data to support the…

  8. CS-E 25 Instructions for Continued Airworthiness

    (See AMC E 25) (a) In accordance with 21.A.61(a), manual(s) must be established containing instructions for continued airworthiness of the Engine.

  9. AMC E 25 Instructions for continued airworthiness

    The maintenance actions are determined through certification testing, including, where applicable, endurance tests, Over-speed tests, Over-temperature…

  10. CS-E 30 Assumptions

    (See AMC E 30) (a) In the course of establishing compliance with CS-E certain assumptions have to be made concerning the conditions that may be imposed…

  11. AMC E 30 Assumptions

    The details required by CS-E 30 concerning assumptions should normally include information on, at least, the items listed in Table 1.

  12. CS-E 40 Ratings

    (See AMC E 40) (a) Power ratings must be established for Take-off Power and/or Thrust and for Maximum Continuous Power and/or Thrust, for all Engines.

  13. AMC E 40 Ratings

    The thrust and / or power ratings to be approved should be adequately justified by the applicant, using as appropriate the results of the calibration…

  14. AMC E 40(b)(3) and (b)(4) 30-Second OEI, 2-Minute OEI and 30-minute Power Ratings

    The 30-Second and 2-Minute OEI Power ratings are two separate ratings.

  15. AMC E 40(d) Operating Limitations

    The Operating limitations established under CS-E 40(d) should normally include those items listed below.

  16. CS-E 50 Engine Control System

    (See AMC E 50, AMC 20-1, AMC 20-3, AMC 20-115) (a) Engine Control System Operation.

  17. AMC E 50 Engine Control System

    Applicability CS-E 50 is applicable to all types of Engine Control Systems.

  18. AMC E 50(e) Rotor integrity

    The Engine control devices, systems and instruments referred to in CS-E 50(e) are usually provided in modern engines by over-speed protection and/or…

  19. AMC E 50(j) Controls - Engines having a 30-Second OEI Power Rating

    The 30-Second OEI rating is intended to provide a rotorcraft with a power reserve in the event of one Engine becoming inoperative.

  20. CS-E 60 Provision for Instruments

    (See AMC E 60) (a) Provision must be made for the installation of instrumentation necessary to ensure operation in compliance with the Engine operating…

  21. AMC E 60 Provision for instruments

    Under the specifications of CS-E 60(a), the Engine manufacturer should define the instrumentation which is necessary for Engine operation within its…

  22. AMC E 60(d) Provision for instruments

    For the purpose of complying with CS-E 60(d), the 30-Second OEI power level is considered to be used whenever one or more of the operating limitations…

  23. CS-E 70 Materials and Manufacturing Methods

    (See AMC E 70) (a) The suitability and durability of materials used in the Engine must be established on the basis of experience or tests.

  24. AMC E 70 Castings, Forgings, Welded Structures and Welded Components

    Castings The means of maintaining the required quality of all castings should be established by such methods as analysis for correct chemical…

  25. CS-E 80 Equipment

    (See AMC E 80) (a) Equipment Drives and Mountings (1) Mountings and drives for all equipment installed on the Engine must be designed:

  26. AMC E 80 Equipment

    The need for additional specifications in the equipment specifications should be determined when complying with CS-E 80 or be defined by the applicant on…

  27. CS-E 90 Prevention of Corrosion and Deterioration

    Each Engine component and each item of equipment must be protected from corrosion and deterioration in an approved manner.

  28. CS-E 100 Strength

    The maximum stresses developed in the Engine must not exceed values conforming to those established by satisfactory practice for the material involved…

  29. CS-E 110 Drawings and Marking of Parts – Assembly of Parts

    The drawings for each Engine component and each item of equipment must give full particulars of the design and must indicate the materials used in terms…

  30. CS-E 120 Identification

    The Engine identification must comply with 21.A.801(a) and (b), and 21.A.805.

  31. CS-E 130 Fire Protection

    (See AMC E 130) (a) The design and construction of the Engine and the materials used must minimise the probability of the occurrence and spread of fire…

  32. AMC E 130 Fire Protection

    Definitions (a) Drain and Vent Systems: Components which are used to convey unused or unwanted quantities of flammable fluid or vapour away from the…

  33. CS-E 135 Electrical Bonding

    (See AMC E 135) Any components, modules, equipment and accessories that are susceptible to or are potential sources of static discharges or currents from…

  34. AMC E 135 Electrical Bonding

    Electrical bonding is a means to protect against the effects of electro-static discharges and currents from electrical Faults.

  35. CS-E 140 Tests - Engine Configuration

    (See AMC E 140) (a) The configuration of the Engine or components or parts to be tested must be sufficiently representative of the type design for the…

  36. AMC E 140 Test - Engine configuration

    For turbine engines, if the power turbine accessory drives are not loaded, the equivalent power should be added as required by CS-E 140(d)(1) to the…

  37. CS-E 150 Tests - General Conduct of Tests

    The fuel and oil used for all tests must normally be chosen from those specified by the Applicant, but, where it may have relevance to the results of any…

  38. AMC E 150(a) Tests - General conduct of tests

    For piston Engines, where the operating conditions of a test represent Maximum Continuous Power at altitude, a higher grade fuel or any other approved…

  39. CS-E 160 Tests - History

    In order to enable compliance with 21.A.21(c)(3) of Part 21, should a Failure of an Engine part occur during the certification tests, its cause must be…

  40. CS-E 170 Engine Systems and Component Verification

    (See AMC E 170) For those systems or components which cannot be adequately substantiated by other tests of CS-E, additional tests or analyses must be…

  41. AMC E 170 Engine systems and component verification

    The intent of CS-E 170 is to define the additional tests or analysis which would be necessary for those systems or components which are not necessarily…

  42. CS-E 180 Propeller Functioning Tests

    (See AMC E 180) (a) If approval of the Engine for use with a Variable Pitch Propeller is sought by the Applicant, a sufficient portion of the tests…

  43. AMC E 180 Propeller Functioning Tests

    For Propeller approval the remaining tests of CS-P may be conducted on another Engine of the same type providing the same Propeller without further…

  44. CS-E 190 Engines for Aerobatic Use

    Where approval is sought for an Engine intended for use in an aeroplane for which the Flight Manual will approve aerobatics or semi-aerobatic flight, the…

Consolidated from the EASA Easy Access Rules (revision 7 Dec 2023, 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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