MODULE 6. MATERIALS AND HARDWARE

MODULE 6. MATERIALS AND HARDWARE


6.1 Aircraft Materials — Ferrous

6.1(a)

Characteristics, properties and identification of common alloy steels used in aircraft;


Heat treatment and application of alloy steels.

6.1(b)

Testing of ferrous materials for hardness, tensile strength, fatigue strength and impact resistance.

6.2 Aircraft Materials — Non-Ferrous

6.2(a)

Characteristics, properties and identification of common non-ferrous materials used in aircraft;

Heat treatment and application of non-ferrous materials;

6.2(b)

Testing of non-ferrous material for hardness, tensile strength, fatigue strength and impact resistance.

6.3 Aircraft Materials — Composite and Non-Metallic

6.3.1 Composite and non-metallic other than wood and fabric

6.3.1(a)

Characteristics, properties and identification of common composite and non-metallic materials, other than wood, used in aircraft;

Sealant and bonding agents.

6.3.1(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.

6.4 Corrosion

6.4(a)

Chemical fundamentals;

Formation by, galvanic action process, microbiological, stress;

6.4(b)

Types of corrosion and their identification;

Causes of corrosion;

Material types, susceptibility to corrosion.

6.5 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.

6.6 Pipes and Unions

6.6(a)

Identification of, and types of rigid and flexible pipes and their connectors used in aircraft;

6.6(b)

Standard unions for aircraft hydraulic, fuel, oil, pneumatic and air system pipes.

6.7 Springs

Types of springs, materials, characteristics and applications.

6.8 Bearings

Purpose of bearings, loads, material, construction;

Types of bearings and their application.

6.9 Transmissions

Gear types and their application;

Gear ratios, reduction and multiplication gear systems, driven and driving gears, idler gears, mesh patterns;

Belts and pulleys, chains and sprockets.

6.10 Control Cables

Types of cables;

End fittings, turnbuckles and compensation devices;

Pulleys and cable system components;

Bowden cables;

Aircraft flexible control systems.

6.11 Electrical Cables and Connectors

Cable types, construction and characteristics;

High tension and co-axial cables;

Crimping;

Connector types, pins, plugs, sockets, insulators, current and voltage rating, coupling, identification codes.