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CS-27) (Amendment 6 27 - CS mendment 6) A ( Easy Access Rules for Small Rotorcraft (CS-27) (Amendment 6) EASA eRules: aviation rules for the 21st century Rules and regulations are the core of the European Union civil aviation system. The aim of the EASA eRules project is to make them accessible in an efficient and reliable way to stakeholders. EASA eRules will be a comprehensive, single system for the drafting, sharing and storing of rules. It will be the single source for all aviation safety rules applicable to European airspace users. It will offer easy (online) access to all rules and regulations as well as new and innovative applications such as rulemaking process automation, stakeholder consultation, cross-referencing, and comparison with ICAO and third countries’ standards. To achieve these ambitious objectives, the EASA eRules project is structured in ten modules to cover all aviation rules and innovative functionalities. The EASA eRules system is developed and implemented in close cooperation with Member States and aviation industry to ensure that all its capabilities are relevant and effective. Published June 20191 1 The published date represents the date when the consolidated version of the document was generated. Powered by EASA eRules Page 2 of 241| Jun 2019 Easy Access Rules for Small Rotorcraft Disclaimer (CS-27) (Amendment 6) DISCLAIMER This version is issued by the European Union Aviation Safety Agency (EASA) in order to provide its stakeholders with an updated and easy-to-read publication. It has been prepared by putting together the certification specifications with the related acceptable means of compliance and guidance material. However, this is not an official publication and EASA accepts no liability for damage of any kind resulting from the risks inherent in the use of this document. Powered by EASA eRules Page 3 of 241| Jun 2019 Easy Access Rules for Small Rotorcraft Note from the editor (CS-27) (Amendment 6) NOTE FROM THE EDITOR The content of this document is arranged as follows: the certification specifications (CS) are followed by the related acceptable means of compliance (AMC) and guidance material (GM) paragraph(s). All elements (i.e. CS, AMC and GM) are colour-coded and can be identified according to the illustration below. The EASA Executive Director (ED) decision through which the point or paragraph was introduced or last amended is indicated below the paragraph title(s) in italics. Certification specification ED decision Acceptable means of compliance ED decision Guidance material ED decision The format of this document has been adjusted to make it user-friendly and for reference purposes. Any comments should be sent to [email protected]. Powered by EASA eRules Page 4 of 241| Jun 2019 Easy Access Rules for Small Rotorcraft Incorporated amendments (CS-27) (Amendment 6) INCORPORATED AMENDMENTS CS/AMC/GM (ED DECISIONS) Incorporated ED Decision CS/AMC/GM Issue No, Amendment No Applicability date ED Decision 2003/15/RM CS-27/ Initial issue 14/11/2003 ED Decision 2007/013/R CS-27/ Amendment 1 30/11/2007 ED Decision 2008/009/R CS-27/ Amendment 2 17/11/2008 ED Decision 2012/021/R CS-27/ Amendment 3 18/12/2012 ED Decision 2016/024/R CS-27/ Amendment 4 2/12/2016 ED Decision 2018/007/R CS-27/ Amendment 5 26/6/2018 ED Decision 2018/015/R CS-27/ Amendment 6 18/12/2018 Note: To access the official versions, please click on the hyperlinks provided above. Powered by EASA eRules Page 5 of 241| Jun 2019 Easy Access Rules for Small Rotorcraft Table of contents (CS-27) (Amendment 6) TABLE OF CONTENTS Disclaimer ...................................................................................... 3 Note from the editor ...................................................................... 4 Incorporated amendments ............................................................. 5 Table of contents ........................................................................... 6 Preamble ..................................................................................... 16 SUBPART A – GENERAL ................................................................. 20 AMC 27 General .................................................................................................................. 20 CS 27.1 Applicability ......................................................................................................... 20 Appendix C – Criteria for Category A ..................................................................... 20 CS 27.2 Special Retroactive Requirements ...................................................................... 22 SUBPART B – FLIGHT .................................................................... 23 GENERAL ............................................................................................................... 23 CS 27.21 Proof of compliance .......................................................................................... 23 CS 27.25 Weight limits ..................................................................................................... 23 CS 27.27 Centre of gravity limits ..................................................................................... 24 CS 27.29 Empty weight and corresponding centre of gravity ......................................... 24 CS 27.31 Removable ballast ............................................................................................ 25 CS 27.33 Main rotor speed and pitch limits .................................................................... 25 PERFORMANCE ...................................................................................................... 27 CS 27.45 General ............................................................................................................. 27 AMC 27.45 Performance General ....................................................................................... 27 CS 27.49 Performance at minimum operating speed ..................................................... 28 CS 27.51 Take-off ............................................................................................................. 29 CS 27.65 Climb: all-engines-operating ............................................................................. 29 CS 27.67 Climb: one-engine-inoperative ......................................................................... 30 CS 27.71 Glide performance ............................................................................................ 30 CS 27.75 Landing.............................................................................................................. 30 CS 27.79 Limiting height-speed envelope ....................................................................... 30 FLIGHT CHARACTERISTICS ...................................................................................... 32 CS 27.141 General ............................................................................................................ 32 Appendix B – Airworthiness Criteria for Helicopter Instrument Flight .................. 32 Powered by EASA eRules Page 6 of 241| Jun 2019 Easy Access Rules for Small Rotorcraft Table of contents (CS-27) (Amendment 6) CS 27.143 Controllability and manoeuvrability ................................................................ 36 CS 27.151 Flight controls ................................................................................................. 38 CS 27.161 Trim control .................................................................................................... 38 CS 27.171 Stability: general ............................................................................................. 38 CS 27.173 Static longitudinal stability ............................................................................. 38 CS 27.175 Demonstration of static longitudinal stability ................................................ 38 CS 27.177 Static directional stability ............................................................................... 39 GROUND AND WATER HANDLING CHARACTERISTICS ............................................. 41 CS 27.231 General ........................................................................................................... 41 CS 27.235 Taxying condition ............................................................................................ 41 CS 27.239 Spray characteristics ....................................................................................... 41 CS 27.241 Ground resonance .......................................................................................... 41 MISCELLANEOUS FLIGHT REQUIREMENTS .............................................................. 42 CS 27.251 Vibration ......................................................................................................... 42 SUBPART C – STRENGTH REQUIREMENTS ..................................... 43 GENERAL ............................................................................................................... 43 CS 27.301 Loads ............................................................................................................... 43 CS 27.303 Factor of safety ............................................................................................... 43 CS 27.305 Strength and deformation .............................................................................. 43 CS 27.307 Proof of structure ........................................................................................... 43 CS 27.309 Design limitations
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