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Module 12 Helicopter Aerodynamics, Structures and Systems: Cat A Exam eBook cover
Syllabus-aligned (EU) 2023/989 Secure eBook Free preview

Module 12 Helicopter Aerodynamics, Structures and Systems: Cat A Exam eBook

Module 12 · Cat A · 25 syllabus subjects

Executive overview

Module 12, Helicopter aerodynamics, structures and systems, asks candidates to master rotor theory, helicopter flight controls, structures, transmissions and rotorcraft systems. It is pitched at Category A depth, where recognition and understanding of line-maintenance tasks come first, so every chapter of this secure ebook is selected for Cat A candidates and nothing is padded with content outside your category.

The edition maps to 25 syllabus subjects of Regulation (EU) 2023/989, Part-66 Appendix I: 19 at Level 1, 6 at Level 2. That split tells you where to spend your hours, since Level 3 subjects are examined in the greatest depth.

Study it alongside the Quiz Engine: each syllabus reference in this manual is a Quiz Competency, so you can practise one subject at a time, then run a timed simulation of the Module 12 examination. Your Online Senior Instructor uses the same references to send you back to the right chapter.

How it helps you pass the exam

  • After the manual you can explain the forces acting on a rotor in hover and forward flight, describe the main and tail rotor drive and control chain and identify the vibration, structural and system checks specific to rotorcraft.
  • It confronts the classic stumbling block head on: dissymmetry of lift, blade flapping and the control phase lag.
  • Expect rotor-dynamics questions that need a clear mental picture; the chapter order follows the syllabus so you can tick subjects off as you go.

Competencies targeted (EASA Part-66 syllabus)

25 syllabus subjects, each shown with the knowledge level examined for the licence scope of this product. Level 1 is familiarisation, Level 2 is general knowledge and Level 3 is detailed knowledge.

Show all 25 subjects
  • 12.1Theory of flight — rotary wing aerodynamicsL1
  • 12.2Flight control systems (ATA 67)L2
  • 12.3Blade tracking and vibration analysis (ATA 18)L1
  • 12.4TransmissionL1
  • 12.5(a)Airframe structures (ATA 51) — General conceptL2
  • 12.5(b)Airframe structures (ATA 51) — Construction methods of the principal elementsL1
  • 12.6.1Air conditioning (ATA 21) — Air supplyL1
  • 12.6.2Air conditioning (ATA 21) — Air conditioningL1
  • 12.7.1Instruments/avionics systems — Instrument systems (ATA 31)L1
  • 12.7.2Instruments/avionics systems — Avionics systems: fundamentals of system layouts and operation of Autoflight (ATA 22), Communications (ATA 23), Navigation systems (ATA 34)L1
  • 12.8Electrical power (ATA 24)L1
  • 12.9(a)Equipment and furnishings (ATA 25) — Emergency equipment; seats, harnesses and belts; lifting systemsL2
  • 12.9(b)Equipment and furnishings (ATA 25) — Emergency flotation systems; cabin layout, cargo retention; equipment layout; cabin furnishing installationL1
  • 12.10(a)Fire protection (ATA 26) — Fire and smoke detection systems and fire-extinguishing systemsL1
  • 12.10(b)Fire protection (ATA 26) — Portable fire extinguishersL1
  • 12.11Fuel systems (ATA 28)L1
  • 12.12Hydraulic power (ATA 29)L1
  • 12.13Ice and rain protection (ATA 30)L1
  • 12.14(a)Landing gear (ATA 32) — System description and operationL2
  • 12.14(b)Landing gear (ATA 32) — SensorsL2
  • 12.15Lights (ATA 33)L2
  • 12.17(a)Integrated modular avionics (ATA 42) — Overall system description and theoryL1
  • 12.17(b)Integrated modular avionics (ATA 42) — Typical system layoutsL1
  • 12.18On-board maintenance systems (ATA 45): central maintenance computers; data-loading system; electronic library systemL1
  • 12.19Information systems (ATA 46)L1

Detailed programme

12.1 Theory of flight
  • 12.1 rotary wing aerodynamics (Level 1)
12.2 Flight control systems (ATA 67)
  • 12.2 Flight control systems (ATA 67) (Level 2)
12.3 Blade tracking and vibration analysis (ATA 18)
  • 12.3 Blade tracking and vibration analysis (ATA 18) (Level 1)
12.4 Transmission
  • 12.4 Transmission (Level 1)
12.5 Airframe structures (ATA 51)
  • 12.5(a) General concept (Level 2)
  • 12.5(b) Construction methods of the principal elements (Level 1)
12.6 Air conditioning (ATA 21)
  • 12.6.1 Air supply (Level 1)
  • 12.6.2 Air conditioning (Level 1)
12.7 Instruments/avionics systems
  • 12.7.1 Instrument systems (ATA 31) (Level 1)
  • 12.7.2 Avionics systems: fundamentals of system layouts and operation of Autoflight (ATA 22), Communications (ATA 23), Navigation systems (ATA 34) (Level 1)
12.8 Electrical power (ATA 24)
  • 12.8 Electrical power (ATA 24) (Level 1)
12.9 Equipment and furnishings (ATA 25)
  • 12.9(a) Emergency equipment; seats, harnesses and belts; lifting systems (Level 2)
  • 12.9(b) Emergency flotation systems; cabin layout, cargo retention; equipment layout; cabin furnishing installation (Level 1)
12.10 Fire protection (ATA 26)
  • 12.10(a) Fire and smoke detection systems and fire-extinguishing systems (Level 1)
  • 12.10(b) Portable fire extinguishers (Level 1)
12.11 Fuel systems (ATA 28)
  • 12.11 Fuel systems (ATA 28) (Level 1)
12.12 Hydraulic power (ATA 29)
  • 12.12 Hydraulic power (ATA 29) (Level 1)
12.13 Ice and rain protection (ATA 30)
  • 12.13 Ice and rain protection (ATA 30) (Level 1)
12.14 Landing gear (ATA 32)
  • 12.14(a) System description and operation (Level 2)
  • 12.14(b) Sensors (Level 2)
12.15 Lights (ATA 33)
  • 12.15 Lights (ATA 33) (Level 2)
12.17 Integrated modular avionics (ATA 42)
  • 12.17(a) Overall system description and theory (Level 1)
  • 12.17(b) Typical system layouts (Level 1)
12.18 On-board maintenance systems (ATA 45): central maintenance computers; data-loading system; electronic library system
  • 12.18 On-board maintenance systems (ATA 45): central maintenance computers; data-loading system; electronic library system (Level 1)
12.19 Information systems (ATA 46)
  • 12.19 Information systems (ATA 46) (Level 1)

Technical specifications and licence eligibility

Module
Module 12, Helicopter aerodynamics, structures and systems
Licence scope
Cat A
Syllabus subjects
25
Highest knowledge level
Level 2
Regulatory basis
Regulation (EU) 2023/989, Part-66 Appendix I
Formats
eBook
Printed pages
329
Language
English
Delivery
Confirmed at checkout

Written for Category A candidates preparing for certification of scheduled line maintenance and simple defect rectification. This manual supports your study and exam preparation. It does not replace approved Part-147 training or the examination set by your competent authority.

Frequently asked questions

Which licence categories does the Module 12 Cat A edition cover?

It follows the Part-66 syllabus columns for Cat A. Subjects that your category does not examine are left out, so you study only what applies to you.

Does this manual replace approved Part-66 training?

No. It is a study and revision resource that mirrors the syllabus. Examinations are sat with your competent authority or an approved Part-147 organisation.

How do I measure progress in Module 12?

Open the Quiz Engine for Module 12: every syllabus reference above has its own competency quiz and the module has a timed exam simulation. Weak results are picked up by your Online Senior Instructor.

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