by easaman » 10 Mar 2009 19:10
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3.9 Capacitance / Capacitor - 2 2 (Level for Cat A B1 B2)
Operation and function of a capacitor,
Factors affecting capacitance area of plates, distance between plates,
number of plates, dielectric and dielectric constant working voltage,
voltage rating;
Capacitor types, construction and function;
Capacitor colour coding;
calculations of capacitance and voltage in series and parallel circuits;
Exponential charge and discharge of a capacitor, time constants;
Testing of capacitors.
3.10 Magnetism
a) - 1 2
Theory of magnetism;
Properties of a magnet;
Action of a magnet suspended in the Earth's magnetic field;
Magnetisation and demagnetisation;
Magnetic shielding;
Various types of magnetic material;
Electromagnets construction and principles of operation;
Hand clasp rules to determine: magnetic field around current carrying
conductor
b) - 1 1
Magneto motive force, field strength, magnetic flux density,
permeability, hysteresis loop, retentivity, coercive force reluctance,
saturation point, eddy currents;
Precautions for care and storage of magnets.
3.11 Inductance / lnductor - 1 2
Faraday's Law;
Action of inducing a voltage in a conductor moving in a magnetic field;
Induction principles;
Effects of the following on the magnitude of an induced voltage:
magnetic field strength, rate of change of flux, number of conductor turns;
Mutual induction-,
The effect the rate of change of primary current and mutual inductance has on induced voltage;
Factors affecting mutual inductance : number of turns in coil, physical size of coil,
permeability of coil, position of coils with respect to each other,
Lenz's Law and polarity determining rules;
Back emf, self induction-.
Saturation point;
Principle uses of inductors;
3.12 DC Motor / Generator Theory - 2 2
Basic motor and generator theory;
Construction and purpose of components in DC generator;
Operation of. and factors affecting output and direction of current flow in DC generators.
Operation of, and factors affecting output power, torque, speed and direction of rotation of C motors;
Series wound, shunt wound and compound motors;
Starter Generator construction.
3.13 AC Theory 1 2 2
Sinusoidal waveform : phase. period, frequency, cycle;
instantaneous, average, root mean square, peak, peak to peak current values and
calculations of these values, in relation to voltage, current and power
Triangular / Square waves;
Single / 3 phase principles.
3.14 Resistive (R), Capacitive (C) and Inductive (L) Circuits - 1 1
Phase relationship of voltage and current in L, C and R circuits, parallel,
series and series parallel;
Power dissipation in L, C and R circuits;
impedance, phase angle, power factor and current calculations;
True power, apparent power and reactive power calculations.
3.15 Transformers - 2 2
Transformer construction principles and operation;
Transformer losses and methods for overcoming them;
Transformer action under load and no-load conditions;
Power transfer efficiency, polarity markings;
Primary and Secondary current, voltage, turns ratio, power, efficiency;
Auto transformers
3.16 Filters - 1 1
Integrator
Operation, application and uses of the following filters :
low pass, high pass, band pass, band stop.
3.17 AC Generators - 2 2
Rotation of loop in a magnetic field and waveform produced;
Operation and construction of revolving armature and revolving field
type AC generators;
Single phase, two phase and three phase alternators;
Three phase star and delta connectors advantages and uses;
Calculation of line and phase voltages and currents;
Calculation of power in a three phase system;
Permanent Magnet Generators.
3.18 AC Motors - 2 2
Construction, principles of operation and characteristics of:
AC synchronous and induction motors both single and polyphase;
Methods of speed control and direction of rotation;
Methods of producing a rotating field: capacitor, inductor, shaded or split pole.
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4. ELECTRONIC FUNDAMENTALS. Level A B1 B2
4.1 Semiconductor's
4.1.1 Diodes
a) - 1 3
Diode symbols, Diode characteristics and properties; Diodes in series and parallel;
Main characteristics and use of silicon controlled rectifiers (thyristors),
light emitting diode, photo conductive diode, varistor, rectifier diodes;
Functional testing of diodes.
4.1.2 Transistors
a) - 1 3
Transistor symbols; Component description and orientation;
Transistor characteristics and properties.
4.1.3 Integrated Circuits - 1 -
Description and operation of logic circuits and linear circuits / operational amplifiers.
4.2 Printed Circuit Boards - 1 3
Description and use of printed circuit boards.
4.3 Servomechanisms
a) - 1 -
Understanding of the following terms : open and closed loop systems, feedback,
follow up, analogue transducers;
Principles of operation and use of the following synchro system components / features :
resolvers, differential , control and torque, transformers, inductance and capacitance transmitters.
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5. DIGITAL TECHNIQUES
ELECTRONIC INSTRUMENT SYSTEMS Level A Bl B2
5.1 Electronic Instrument systems 1 2 3
Typical systems arrangements and cockpit layout of electronic
instrument systems.
5.2 Numbering Systems - 1 2
Numbering systems: binary, octal and hexadecimal;
Demonstration of conversions between the decimal and binary, octal and
hexadecimal systems and vice versa.
5.3 Data Conversion - 1 2
Analogue Data, Digital Data;
Operation and application of analogue to digital, and digital to
analogue converters, inputs and outputs, limitations of various types.
5.4 Data Buses - 2 2
Operation of data buses in aircraft systems, including knowledge of ARINC
and other specifications.
5.5 Logic Circuits
a) - 2 2
Identification of common logic gate symbols, tables and equivalent circuits;
Applications used for aircraft systems, schematic diagrams.
5.6 BasicComputer Structure
a) - 1 2
Computer terminology (including bit, byte, software, hardware, CPU, IC,
and various memory devices such as RAM, ROM, PROM);
Computer technology (as applied in aircraft systems).
5.10 Fibre Optics - 1 3
Advantages and disadvantages of fibre optic data transmission
over electrical wire propagation; Fibre optic data bus;
Fibre optic related terms;
Terminations;
Couplers, control terminals, remote terminals;
Application of fibre optics in aircraft systems.
5.11 Electronic Displays - 2 3
Principles of operation of common types of displays used in modern
aircraft including
Cathode Ray Tubes, Light Emitting Diodes and Liquid Crystal Display.
5.12 Electrostatic Sensitive Devices 1 3 3
Special handling of components sensitive to electrostatic discharges;
Awareness of risks and possible damage, component and personnel anti-static protection devices.
5.13 Software Management Control - 2 3
Awareness of restrictions, airworthiness requirements and possible
catastrophic effects of unapproved changes to software programmes.
5.14 Electromagnetic Environment - 2 3
Influence of the following phenomena on maintenance practices for electronic system :
EMC - Electromagnetic Compatibility
EMI - Electromagnetic Interference
HIRF - High lntensity Radiated Field
Lightning / lightning protection
5.15 Typical Electronic / Digital Aircraft Systems - 2 2
General arrangement of typical electronic/digital aircraft systems and associated BITE
(Built In Test Equipment) testing such as :
ACARS - ARINC Communication and Addressing and Reporting System
ECAM - Electronic Centralised Aircraft Monitoring
EFIS - Electronic Flight Instrument System
EICAS - Engine Indication and Crew Alerting System
FBW - Fly by Wire
FMS - Flight Management System
GPS - Global Positioning System
IRS - inertial Reference System
TCAS - Traffic Alert Collision Avoidance System
Note : Different manufacturers may use different terminology for similar systems.
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7.7 Electrical Cables and Connectors 1 3 3
Continuity, insulation and bonding techniques and testing;
Use of crimp tools hand and hydraulic operated;
Testing of crimp joints ;
Connector pin removal and insertion;
Co-axial cables : testing and installation precautions;
Wiring protection techniques : Cable looming and loom support, cable clamps,
protective sleeving techniques including heat shrink wrapping, shielding.
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11.5.2 Avionic Systems 1 1 -
Fundamentals of system lay-outs and operation of;
Auto Flight (ATA 22);
Communications (ATA 23);
Navigation Systems (ATA 34).
11.6 Electrical Power (ATA 24) 2 3 -
Batteries Installation and Operation; DC power generation;
AC power generation;
Emergency power generation;
Voltage regulation;
Power distribution;
inverters, transformers, rectifiers;
Circuit protection.
External / Ground power;
Equipment and Furnishings (ATA 25)
a) 2 2 -
Emergency equipment requirements;
Seats, harnesses and belts.
b) 1 1 -
Cabin lay-out;
Equipment lay-out;
Cabin Furnishing Installation;
Cabin entertainment equipment;
Galley installation;
Cargo handling and retention equipment;
Airstairs.
11.14 Lights (ATA 33) 2 3 -
External: navigation, landing, taxiing, ice;
Internal: cabin, cockpit, cargo;
Emergency.
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