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Elements and Performance Criteria

1. Prepare for troubleshooting
   • Relevant maintenance documentation and modification status, including system defect reports, where relevant, are used to identify an unserviceability
2. Test/adjust electrical systems
   • Aircraft and system are prepared in accordance with applicable maintenance manual for the application of power/system operation
   • Electrical system is functionally tested in accordance with maintenance manual for evidence of serviceability or malfunction while observing all relevant work health and safety (WHS) requirements
   • System calibration or adjustments are performed in accordance with maintenance manual, as appropriate
3. Troubleshoot electrical systems
   • Available information from maintenance documentation and inspection and test results is used, where necessary, to assist in fault determination
   • Maintenance manual fault diagnosis guides and logic processes are used to ensure efficient and accurate troubleshooting to line replacement level
   • Specialist advice is obtained, where required, to assist with the troubleshooting process
   • System faults are located and the causes of the faults are clearly identified and correctly recorded in maintenance documentation, where required
   • Rectification requirements are determined

Range Statement

This field allows for different work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included.
Electrical systems and components include:	All related electrical hardware, looms and cables Alternating current (AC) and/or direct current (DC) power generation, regulation and distribution systems Rotary and static inverters and transformer rectifier (TR) units Air cycle air conditioning and pressurisation systems Flight and engine control systems Ignition and starting systems Fire/smoke detection and extinguishing Lighting (internal and external) Master and caution warning systems Equipment cooling and ventilation Equipment and furnishing Position indicating systems Fuel storage and distribution Landing gear indication and anti-skid Main batteries and battery bus ties/interlocks Propeller control systems (where applicable to the enterprise) Ice and rain protection (where applicable to the enterprise) Wastewater (where applicable to the enterprise)
Procedures and requirements include:	Industry standard procedures specified by manufacturers, regulatory authorities or the enterprise

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Performance Evidence

Evidence required to demonstrate competency in this unit must be relevant to and satisfy all of the requirements of the elements and performance criteria under the specified conditions of assessment, and must include:

applying relevant WHS practices

using approved maintenance documentation and aircraft publications relating to the electrical system being maintained

recognition of system and electrical component defects/external damage, correct installation, connection of plugs, terminations, and attaching hardware (including cabling/harnesses) and security in:

AC and DC power generation systems, including regulation, distribution, control and cooling

battery installations

flight control and/or electro-hydraulic systems

engine ignition, starting, fuel distribution and control systems

internal/external lighting systems, including controls

landing gear systems

anti-skid braking systems

auxiliary systems, including ice/rain protection, fire detection, environmental control and pressurisation, water and waste, doors, propeller control, equipment and furnishings

equipment cooling and ventilation systems

master caution and warning systems

applying logic processes, taking and interpreting electrical measurements, and using test equipment and appropriate wiring diagrams and manuals to isolate electrical system malfunctions of the above components and systems

performing system functional tests and checks to isolate system faults and assess post-maintenance serviceability.

It is essential that system testing procedures, cleanliness requirements and safety precautions applicable to the electrical system being maintained are fully observed, understood and complied with. Ability to interpret inspection procedures and specifications (allowable limits) and apply them in practice across a range of inspection, testing and troubleshooting applications (including the timely involvement of supervisors or other trades) is critical.

Evidence of transferability of skills and knowledge related to testing and troubleshooting is essential. This is to be demonstrated through application across a range of aircraft electrical systems and components listed in the Assessment Conditions.

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Knowledge Evidence

Evidence required to demonstrate competency in this unit must be relevant to and satisfy all of the requirements of the elements and performance criteria and include knowledge of:

component attachment methods

connection of hardware

explaining the basic layout (block diagram level), function and operation of:

AC and DC power generation systems, including regulation, distribution, control and cooling

battery installations

flight control and/or electro-hydraulic systems

engine ignition, starting, fuel distribution and control systems

internal/external lighting systems, including controls

landing gear systems

anti-skid braking systems

auxiliary systems, including ice/rain protection, fire detection, environmental control and pressurisation, water and waste, doors, propeller control, equipment and furnishings

equipment cooling and ventilation systems

master caution and warning systems

explaining basic principles/functions, relating to systems listed above and associated with:

basic AC and DC circuit theory

digital fundamentals

analogue fundamentals

AC and DC generator characteristics

single and polyphase AC motors and DC motors

rotary and static inverters

air cycle air conditioning

electrical sensing and transmitting devices

WHS requirements applicable to the maintenance of aircraft electrical systems, including gas turbine engine high-energy ignition units

electrical system maintenance requirements and troubleshooting procedures

relevant maintenance manuals

relevant regulatory requirements and standard procedures.

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