Unit of competency Outline
Date retreived
22/07/2026 3:07 PM AWST
22/07/2026 3:07 PM AWST
Whilst all efforts are made to provide accurate and timely information from the relevant source/documentation, please be aware that the information supplied may not be the most current version. The accuracy of the detail has not been confirmed by the Department and therefore should not be relied upon without first confirming the contents.
Maintain basic light aircraft electrical systems and components
Maintain basic light aircraft electrical systems and components
Unit of competency
National Code
MEA274A
MEA274A
State Code
D4444
D4444
TGA Status
Replaced
Replaced
DTWD Status
Replaced
Replaced
State Implementation and Classification
Approved Date
10/05/2012
Field of Education
031503 - Aircraft Maintenance Engineering
Original Release Date
10/05/2012
Nominal Hours
60
Description
This unit of competency is part of the Avionic Certificate IV (Aircraft Maintenance Stream) training pathway. It covers the competencies required for the maintenance of electrical systems of the more basic types of both fixed and rotary wing aircraft. Where a CASA licensing outcome is sought this unit forms part of the CASA requirement for the granting of the applicable Aircraft Maintenance Engineer Licence under CASR Part 66, in accordance with the licensing provisions in Section 3, Assessment Guidelines.
Notes
Elements and Performance Criteria
1. Inspect basic aircraft electrical systems and components
- 1.1. Relevant maintenance documentation and modification status, including system defect reports, where relevant, are used to identify specific inspection requirements
- 1.2. Isolation tags are checked and aircraft configured for safe system inspection and operation in accordance with the applicable maintenance manual
- 1.3. DC electrical system is visually or physically checked for external signs of defects in accordance with applicable maintenance manual
- 1.4. Defects are correctly identified and reported
2. Test/adjust basic aircraft electrical systems
- 2.1. Aircraft and system are prepared in accordance with applicable maintenance manual for the application of power/system operation
- 2.2. Electrical system is functionally tested, in accordance with maintenance manual, for evidence of serviceability or malfunction
- 2.3. System calibration or adjustments are performed in accordance with maintenance manual, as appropriate
3. Troubleshoot basic aircraft electrical systems
- 3.1. Available information from maintenance documentation and inspection and test results is used, where necessary, to assist in fault determination
- 3.2. Maintenance manual fault diagnosis guides and logic processes are used to ensure efficient and accurate troubleshooting
- 3.3. Specialist advice is obtained, where required, to assist with the troubleshooting process
- 3.4. System faults are located and the causes of the faults are clearly identified and correctly recorded in maintenance documentation, where required, and in accordance with standard enterprise procedures
- 3.5. Rectification requirements are determined
4. Remove and install basic aircraft electrical system components
- 4.1. System is rendered safe and prepared in accordance with the applicable maintenance manual and isolation tags are fitted where necessary to ensure personnel safety
- 4.2. Electrical component removal is carried out in accordance with the applicable maintenance manual
- 4.3. Required maintenance documentation is completed and processed in accordance with standard enterprise procedures
- 4.4. Removed components are tagged and packaged in accordance with specified procedures
- 4.5. Electrical components to be installed are checked to confirm correct part numbers, modification status, serviceability and shelf life
- 4.6. Physical installation of electrical components is performed in accordance with the applicable maintenance manual, ensuring appropriate adjustment/alignment with mechanical interface is carried out
- 4.7. System is reinstated to correct operational condition in preparation for testing, as necessary
- 4.8. Required maintenance documentation is completed and processed in accordance with standard enterprise procedures
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
Applicable electrical systems
Electrical systems may include:
1. DC power generation, regulation and distribution systems
2. Piston engine and gas turbine engine ignition and starting systems (as applicable to the enterprise)
3. DC electrical systems, such as flaps, including related motors and actuators
4. Aircraft lighting
5. Aircraft main battery
Troubleshooting
Troubleshooting involves the use of fault-finding charts or similar, to line replacement level
Applicable electrical components
Electrical components include:
6. DC generators, and alternator/rectifier generators, and components of related single generator regulation and distribution systems
7. Motors
8. Actuators
9. Piston engine ignition and starting system components
10. Aircraft batteries
11. Aircraft lighting components, such as bulbs, lenses, switches and rheostats
Application
Application of this unit may relate to:
scheduled or unscheduled maintenance
individual or team-related activities
Procedures and requirements
Refer to industry standard procedures specified by manufacturers, regulatory authorities or the enterprise
Note
Range statements listed below are numbered to facilitate specification of the assessment requirements included in the Evidence Guide
Applicable electrical systems
Electrical systems may include:
1. DC power generation, regulation and distribution systems
2. Piston engine and gas turbine engine ignition and starting systems (as applicable to the enterprise)
3. DC electrical systems, such as flaps, including related motors and actuators
4. Aircraft lighting
5. Aircraft main battery
Troubleshooting
Troubleshooting involves the use of fault-finding charts or similar, to line replacement level
Applicable electrical components
Electrical components include:
6. DC generators, and alternator/rectifier generators, and components of related single generator regulation and distribution systems
7. Motors
8. Actuators
9. Piston engine ignition and starting system components
10. Aircraft batteries
11. Aircraft lighting components, such as bulbs, lenses, switches and rheostats
Application
Application of this unit may relate to:
scheduled or unscheduled maintenance
individual or team-related activities
Procedures and requirements
Refer to industry standard procedures specified by manufacturers, regulatory authorities or the enterprise
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 inspect, test and troubleshoot basic DC electrical systems and remove and install components, including looms, cables and connection hardware, while observing all relevant safety precautions.
Critical aspects for assessment and evidence required to demonstrate competency in this unit
The underlying skills inherent in this unit should be transferable across a range of inspection, testing and troubleshooting applications (including the timely involvement of supervisors or other trades) associated with basic aircraft DC electrical systems and components. It is essential that system testing procedures, 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. Ability to interpret inspection procedures and specifications (allowable limits) and apply them in practice is critical.
Evidence of transferability of skills and knowledge related to inspection, testing and troubleshooting and component removal and installation is essential. This is to be demonstrated through application across a range of aircraft electrical systems and components listed in the Range Statement. The application of testing procedures should clearly indicate knowledge of system operation, the relationship of individual components and the links with other systems (if applicable) within the limits of the aircraft/system fault-finding guide 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 electrical looms, cables and connection hardware, and on each system in Range Statement Groups 1 to 4 and on at least one major component/LRU in each case. For Group 5, competency may be demonstrated through the performance of a battery check. Component removal and installation competencies are to be demonstrated on at least one component from each of groups 6 to 11. This shall be established via the records in the Log of Industrial Experience and Achievement or, where appropriate, an equivalent Industry Evidence Guide.
Context of and specific resources for assessment
Competency should be assessed in the work environment or simulated work environment using tools and equipment specified in maintenance documentation. It is also expected that general purpose tools and test equipment found in most routine situations would be used where appropriate.
Method of assessment
Guidance information for assessment
Overview of assessment
A person who demonstrates competency in this unit must be able to inspect, test and troubleshoot basic DC electrical systems and remove and install components, including looms, cables and connection hardware, while observing all relevant safety precautions.
Critical aspects for assessment and evidence required to demonstrate competency in this unit
The underlying skills inherent in this unit should be transferable across a range of inspection, testing and troubleshooting applications (including the timely involvement of supervisors or other trades) associated with basic aircraft DC electrical systems and components. It is essential that system testing procedures, 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. Ability to interpret inspection procedures and specifications (allowable limits) and apply them in practice is critical.
Evidence of transferability of skills and knowledge related to inspection, testing and troubleshooting and component removal and installation is essential. This is to be demonstrated through application across a range of aircraft electrical systems and components listed in the Range Statement. The application of testing procedures should clearly indicate knowledge of system operation, the relationship of individual components and the links with other systems (if applicable) within the limits of the aircraft/system fault-finding guide 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 electrical looms, cables and connection hardware, and on each system in Range Statement Groups 1 to 4 and on at least one major component/LRU in each case. For Group 5, competency may be demonstrated through the performance of a battery check. Component removal and installation competencies are to be demonstrated on at least one component from each of groups 6 to 11. This shall be established via the records in the Log of Industrial Experience and Achievement or, where appropriate, an equivalent Industry Evidence Guide.
Context of and specific resources for assessment
Competency should be assessed in the work environment or simulated work environment using tools and equipment specified in maintenance documentation. It is also expected that general purpose tools and test equipment found in most routine situations would be used where appropriate.
Method of assessment
Guidance information for assessment
Replaced By
| State Code | National Code | Title | Type |
|---|---|---|---|
| AUD62 | MEA274 | Maintain basic light aircraft electrical systems and components | Unit of competency |
| State Code | National Code | Title | Type |
|---|---|---|---|
| D743 | MEA40611 | Certificate IV in Aeroskills (Avionics) | Qualification |
| D741 | MEA30211 | Certificate III in Aeroskills (Mechatronics) | Qualification |
| D746 | MEA41011 | Certificate IV in Aeroskills (Mechatronics) | Qualification |