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UK CAA Part-66 Module 12 Helicopter Aerodynamics, Structures and Systems (B1.3) — Information & Free Practice

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About UK CAA Part-66 Module 12 Helicopter Aerodynamics, Structures and Systems (B1.3)

UK CAA Part-66 Module 12 Helicopter Aerodynamics, Structures and Systems (B1.3) · GB

Key exam facts

Provider
UK Civil Aviation Authority (CAA) national Part-66 standard. Basic examinations are conducted by the CAA or an appropriately approved UK Part-147 training organisation.
Format
Written knowledge examination: multiple-choice questions with three alternatives and one correct answer; no essay questions for Module 12. CAA delivery uses its e-exam service.
Exam questions
Total questions: 128.
Time limit
160 minutes answering time. CAA candidates must arrive at least 30 minutes before the scheduled exam; arrival time is additional.
Passing score
75% for the module multiple-choice examination. Penalty marking is not used.
Exam fee
GBP £60 for each attempt at a written module or part-module examination conducted by the CAA (ORS5 No. 446, effective 1 April 2026). This is a per-attempt CAA charge, not a price guarantee for independent Part-147 providers.

Topics covered

  • Theory of Flight — Rotary Wing Aerodynamics

  • Flight Control Systems

  • Blade Tracking and Vibration Analysis

  • Transmission

  • Airframe Structures

    • (a) Airworthiness requirements for structural strength; Structural classification, primary, secondary and tertiary; Fail safe, safe life, damage tolerance concepts; Zonal and station identification systems; Stress, strain, bending, compression, shear, torsion, tension, hoop stress, fatigue; Drains and ventilation provisions; System installation provisions; Lightning strike protection provision;
    • (b) Construction methods of: stressed skin fuselage, formers, stringers, longerons, bulkheads, frames, doublers, struts, ties, beams, floor structures, reinforcement, methods of skinning and anti-corrosive protection. Pylon, stabiliser and undercarriage attachments; Seat installation; Doors: construction, mechanisms, operation and safety devices; Windows and windscreen construction; Fuel storage; Firewalls; Engine mounts; Structure assembly techniques: riveting, bolting, bonding; Methods of surface protection, such as chromating, anodising, painting; Surface cleaning. Airframe symmetry: methods of alignment and symmetry checks.

  • Air Conditioning (ATA 21)

    • Air supply — Sources of air supply including engine bleed and ground cart. (B1.3 level 2)
    • Air conditioning — Air conditioning systems; Distribution systems; Flow and temperature control systems; Protection and warning devices. (B1.3 level 3)

  • Instruments/Avionic Systems

    • Instrument Systems (ATA 31) — Pitot static: altimeter, air speed indicator, vertical speed indicator; Gyroscopic: artificial horizon, attitude director, direction indicator, horizontal situation indicator, turn and slip indicator, turn coordinator; Compasses: direct reading, remote reading; Vibration indicating systems — HUMS; Glass cockpit; Other aircraft system indication. (B1.3 level 2)
    • Avionic Systems — Fundamentals of system layouts and operation of: Auto Flight (ATA 22); Communications (ATA 23); Navigation Systems (ATA 34). (B1.3 level 1)

  • Electrical Power (ATA 24)

  • Equipment and Furnishings (ATA 25)

    • (a) Emergency equipment requirements; Seats, harnesses and belts; Lifting systems; (B1.3 level 2)
    • (b) Emergency flotation systems; Cabin lay-out, cargo retention; Equipment lay-out; Cabin Furnishing Installation. (B1.3 level 1)

  • Fire Protection (ATA 26)

  • Fuel Systems (ATA 28)

  • Hydraulic Power (ATA 29)

  • Ice and Rain Protection (ATA 30)

  • Landing Gear (ATA 32)

  • Lights (ATA 33)

  • Pneumatic/Vacuum (ATA 36)

  • Integrated Modular Avionics (ATA42)

  • On Board Maintenance Systems (ATA45)

  • Information Systems (ATA46)

How to prepare

Work through the topics, read the explanation after each answer, and revisit the areas where you miss questions. Use the official outline and reference materials below to guide your study.

These independent practice questions are not actual exam items and do not guarantee a passing result.

Frequently asked questions

What is the exam format?

Written knowledge examination: multiple-choice questions with three alternatives and one correct answer; no essay questions for Module 12. CAA delivery uses its e-exam service.

How many questions are on the exam?

Total questions: 128.

How long is the exam?

160 minutes answering time. CAA candidates must arrive at least 30 minutes before the scheduled exam; arrival time is additional.

What is the passing score?

75% for the module multiple-choice examination. Penalty marking is not used.

How much does the exam cost?

GBP £60 for each attempt at a written module or part-module examination conducted by the CAA (ORS5 No. 446, effective 1 April 2026). This is a per-attempt CAA charge, not a price guarantee for independent Part-147 providers.

Official sources and references

Confirm current exam arrangements with the exam provider.