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Elements and Performance Criteria

1. Remove AC and DC aircraft electrical system components
   • System is rendered safe and prepared in accordance with the applicable maintenance manual and isolation tags are fitted, where necessary, to ensure personnel safety
   • Electrical component removal is carried out in accordance with the applicable maintenance manual while observing all relevant work health and safety (WHS) requirements
   • Required maintenance documentation is completed and processed in accordance with standard enterprise procedures
   • Removed components are tagged and packaged in accordance with specified procedures
2. Install AC and DC aircraft electrical system components.
   • Electrical components to be installed are checked to confirm correct part numbers, modification status, serviceability and shelf life
   • Physical installation of electrical components is performed in accordance with the applicable maintenance manual, ensuring appropriate adjustment/alignment with mechanical interface is carried out
   • System is reinstated to correct operational condition in preparation for testing, as necessary
   • Required maintenance documentation is completed and processed in accordance with standard enterprise procedures

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 system components include:	DC and AC power generation and distribution system components, including generators and related multi-sourced DC power generation, starter generators alternators and regulation, and control and distribution system components Transformer rectifier units and/or inverters Batteries and related bus tie or interlock system components and battery temperature monitoring systems Motors and actuators Components of gas turbine and/or piston engine ignition and starting systems (where applicable to the enterprise) External/internal lights Electrical components of specific electrical systems, such as air cycle air conditioning, combustion heaters, equipment cooling, anti-icing and de-icing, landing gear, anti-skid, flight control, master and central warning, fuel storage and distribution, fire warning and extinguishing, and engine/propeller control (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 include:

identifying/locating:

DC power regulation, distribution and control systems and components, i.e. regulators and bus bars

AC power regulation, distribution and control systems and components, i.e. generator control units

various types of inverters and transformer rectifier units

gas turbine and piston engine ignition and starting systems and components (where applicable to the enterprise)

batteries (lead acid and nickel cadmium) and associated mounting equipment including related anti-vibration aids and battery temperature monitoring systems

flight control servo actuating devices, i.e. AC and DC electro-mechanical, electro-pneumatic, electro-hydraulic, duplex servomotors, power control units and trim control devices

electrical components of aircraft systems, such as air cycle air conditioning, anti-icing and de-icing, landing gear, anti-skid, flight control, master and central warning, fuel storage and distribution, external and internal lighting, fire warning and extinguishing, and engine/propeller control (where applicable to the enterprise)

correctly connecting:

DC generators

star or delta alternators to star and delta loads

starter generators

AC motors

polyphase motors

applying relevant WHS practices.

It is essential that cleanliness requirements and safety precautions applicable to the system being maintained are fully observed, understood and complied with, as well as work practices associated with electrostatic sensitive devices.

Evidence of transferability of skills and knowledge related to removal and installation is essential. This is to be demonstrated by application across a range of aircraft major electrical system components encompassing electrical with mechanical interface and installations that require alignment and/or adjustment (mechanical or electrical).

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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 and plugs

relevant WHS practices

the use of approved maintenance documentation and aircraft publications relating to AC and DC electrical systems

properties of permanent magnets

precautions for the care and storage of permanent magnets

bonding of aircraft components and lightning protection

general construction, operating characteristics and applications for aircraft:

generators

alternators

AC and DC motors

transformer rectifier units

rotary and static inverters

batteries

linear and rotary actuators

relevant maintenance manuals

relevant regulatory requirements and standard procedures

environmental protection requirements relating to Halon fire extinguishers (e.g. Bromochlorodifluoromethane (BCF)).

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