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UK CAA Part-66 Module 6 Materials and Hardware (B1.1) — Information & Free Practice

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About UK CAA Part-66 Module 6 Materials and Hardware (B1.1)

UK CAA Part-66 Module 6 Materials and Hardware (B1.1) · GB

Key exam facts

Provider
UK Civil Aviation Authority (CAA) sets the UK Part-66 standard. Examinations are conducted by the UK CAA or an appropriately approved UK Part-147 maintenance training organisation.
Format
Full initial Module 6 B1.1 knowledge examination: multiple-choice, three alternatives per question and one correct answer; no essay questions. CAA delivery uses its venue-based e-Exams service; UK Part-147 approved organisations may also conduct the examination.
Exam questions
Total questions: 72.
Time limit
90 minutes of answering time for the full Module 6 Category B1 paper. CAA requires arrival at least 30 minutes before the scheduled examination; that arrival period is separate.
Passing score
75% for the module multiple-choice examination. Penalty marking systems are not used.
Exam fee
GBP £60 for each attempt at a written module or part-module examination conducted by the CAA, including repeat attempts (ORS5 No 446, Table 60(f), effective 1 April 2026). This CAA charge does not establish a uniform price for independently delivered UK Part-147 examinations.

Topics covered

  • Aircraft Materials — Ferrous

    • (a) Characteristics, properties and identification of common alloy steels used in aircraft; Heat treatment and application of alloy steels.
    • (b) Testing of ferrous materials for hardness, tensile strength, fatigue strength and impact resistance.

  • Aircraft Materials — Non-Ferrous

    • (a) Characteristics, properties and identification of common non-ferrous materials used in aircraft; Heat treatment and application of non-ferrous materials;
    • (b) Testing of non-ferrous material for hardness, tensile strength, fatigue strength and impact resistance.

  • Aircraft Materials — Composite and Non-Metallic

    • 6.3.1 Composite and non-metallic other than wood and fabric
    • (a) Characteristics, properties and identification of common composite and non-metallic materials, other than wood, used in aircraft; Sealant and bonding agents;
    • (b) The detection of defects/deterioration in composite and non-metallic material; Repair of composite and non-metallic material.
    • 6.3.2 Wooden structures Construction methods of wooden airframe structures; Characteristics, properties and types of wood and glue used in aeroplanes; Preservation and maintenance of wooden structure; Types of defects in wood material and wooden structures; The detection of defects in wooden structure; Repair of wooden structure.
    • 6.3.3 Fabric covering Characteristics, properties and types of fabrics used in aeroplanes; Inspections methods for fabric; Types of defects in fabric; Repair of fabric covering.

  • Corrosion

    • (a) Chemical fundamentals; Formation by, galvanic action process, microbiological, stress;
    • (b) Types of corrosion and their identification; Causes of corrosion; Material types, susceptibility to corrosion.

  • Fasteners

    • 6.5.1 Screw threads Screw nomenclature; Thread forms, dimensions and tolerances for standard threads used in aircraft; Measuring screw threads.
    • 6.5.2 Bolts, studs and screws Bolt types: specification, identification and marking of aircraft bolts, international standards; Nuts: self locking, anchor, standard types; Machine screws: aircraft specifications; Studs: types and uses, insertion and removal; Self tapping screws, dowels.
    • 6.5.3 Locking devices Tab and spring washers, locking plates, split pins, pal-nuts, wire locking, quick release fasteners, keys, circlips, cotter pins.
    • 6.5.4 Aircraft rivets Types of solid and blind rivets: specifications and identification, heat treatment.

  • Pipes and Unions

    • (a) Identification of, and types of rigid and flexible pipes and their connectors used in aircraft;
    • (b) Standard unions for aircraft hydraulic, fuel, oil, pneumatic and air system pipes.

  • Springs

  • Bearings

  • Transmissions

  • Control Cables

  • Electrical Cables and Connectors

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?

Full initial Module 6 B1.1 knowledge examination: multiple-choice, three alternatives per question and one correct answer; no essay questions. CAA delivery uses its venue-based e-Exams service; UK Part-147 approved organisations may also conduct the examination.

How many questions are on the exam?

Total questions: 72.

How long is the exam?

90 minutes of answering time for the full Module 6 Category B1 paper. CAA requires arrival at least 30 minutes before the scheduled examination; that arrival period is separate.

What is the passing score?

75% for the module multiple-choice examination. Penalty marking systems are 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, including repeat attempts (ORS5 No 446, Table 60(f), effective 1 April 2026). This CAA charge does not establish a uniform price for independently delivered UK Part-147 examinations.

Official sources and references

Confirm current exam arrangements with the exam provider.