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Elements and Performance Criteria

1. Remove 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 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 systems and components include:	DC generators, and alternator/rectifier generators, and components of related single generator regulation and distribution systems Motors Actuators Piston engine ignition and starting system components Aircraft batteries Specific components of DC electrical systems, such as flaps and landing gear Aircraft lighting Gas turbine engine igniter and starting systems
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:

identifying/locating:

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

piston engine ignition systems and components, i.e. coils, magnetos, auxiliary starting devices (impulse couplings and inductors/vibrators)

gas turbine engine igniter and starting system components (where applicable to enterprise)

batteries (lead acid and nickel cadmium) and associated mounting equipment, including related anti-vibration aids

motors and actuators in basic DC electrical systems

specific components of DC electrical systems, such as flaps and landing gear

correctly connecting DC generators and alternator/rectifier generators

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, installations which 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 DC electrical systems

properties of permanent magnets

precautions for the care and storage of permanent magnets

general construction, operating characteristics and applications for:

aircraft DC generators

alternator/rectifier DC generators

DC starter/generators

DC motors, including starter motors

DC rotary and linear actuators

batteries

how to locate and identify components of:

DC power regulation and distribution systems

piston engine ignition and starting systems

gas turbine engine igniter systems, including specific WHS precautions

gas turbine engine starting systems

DC electrical systems, such as flaps and landing gear retraction

lighting systems

relevant maintenance manuals

relevant regulatory requirements and standard procedures.

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