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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.
   • 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

Required Skills

Required skills

Look for evidence that confirms skills in Identifyinglocating DC power generation regulation distribution and control systems and components ie regulators and bus bars piston engine ignition systems and components ie coils magnetos auxiliary starting devices impulse couplings and inductorsvibrators gas turbine engine igniter and starting system components where applicable to enterprise batteries lead acid and nickel cadmium and associated mounting equipment including related antivibration 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 alternatorrectifier generators Applying relevant OHS practices

Required knowledge

Look for evidence that confirms knowledge of Component attachment methods Connection of hardware and plugs Relevant OHS 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 alternatorrectifier DC generators DC startergenerators 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 OHS 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

Evidence Required

The Evidence Guide provides advice on assessment and must be read in conjunction with the performance criteria required skills and knowledge range statement and the Assessment Guidelines for the Training Package
Overview of assessment	A person who demonstrates competency in this unit must be able to remove and install components of DC electrical systems while observing all relevant safety precautions
Critical aspects for assessment and evidence required to demonstrate competency in this unit	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 andor adjustment mechanical or electrical An understanding of the attachment methods connection of hardware and the need for adjustment or rigging and system operation as they relate to the work must be demonstrated before undertaking any action The work plan should take account of applicable safety and quality requirements in accordance with the industry and regulatory standards A person cannot be assessed as competent until it can be demonstrated to the satisfaction of the workplace assessor that the relevant elements of the Unit of Competency are being achieved under routine supervision on at least one component from each of groups to in the Range Statement group may be omitted when not applicable to the enterprise This shall be established via the records in the Log of Industrial Experience and Achievement or where appropriate an equivalent Industry
Context of and specific resources for assessment	Competency should be assessed in the workplace or simulated workplace using tools and equipment specified in maintenance manuals It is also expected that generalpurpose tools test and ground support equipment found in most routine situations would be used where appropriate
Method of assessment
Guidance information for assessment

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Range Statement

The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.
Note	Range statements listed below are numbered to facilitate specification of the assessment requirements included in the Evidence Guide.
Electrical systems and components	Electrical components include: 1 DC generators, and alternator/rectifier generators, and components of related single generator regulation and distribution systems 2. Motors 3. Actuators 4. Piston engine ignition and starting system components 5. Aircraft batteries 6. Specific components of DC electrical systems such as flaps, landing gear 7. Aircraft lighting 8. Gas turbine engine igniter and starting systems
	Application of this unit may relate to: Scheduled or unscheduled maintenance activities Individual or team related activities
Procedures and requirements	Refer to industry standard procedures specified by manufacturers, regulatory authorities or the enterprise

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