Unit of competency Outline
Date retreived
23/07/2026 9:53 AM AWST
23/07/2026 9:53 AM 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 light aircraft AC powered instrument systems and components
Maintain light aircraft AC powered instrument systems and components
Unit of competency
National Code
MEA281
MEA281
State Code
AUF23
AUF23
TGA Status
Replaced
Replaced
DTWD Status
Replaced
Replaced
State Implementation and Classification
Approved Date
22/07/2015
Field of Education
031503 - Aircraft Maintenance Engineering
Original Release Date
22/07/2015
Nominal Hours
60
Description
This unit of competency requires application of hand skills and the use of system/component knowledge and applicable test equipment to inspect, test and troubleshoot alternating current (AC) powered aircraft instrument systems, including the power supply, and to remove and install components during scheduled or unscheduled maintenance. Work may be performed individually or as part of a team.Applications include light fixed wing and rotary wing aircraft with piston or turbine engines.The unit is part of the small aircraft maintenance Certificate IV (Mechatronics) training pathway. Where a Civil Aviation Safety Authority (CASA) licensing outcome is sought this unit forms part of the CASA requirement for the granting of the chosen maintenance certification licence under Civil Aviation Safety Regulation (CASR) Part 66, in accordance with the licensing provisions in the Companion Volume Implementation Guide.
Notes
Elements and Performance Criteria
1. Inspect light aircraft AC instrument systems, power supplies 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 AC instrument system and AC power supply components are visually or physically checked for external signs of defects in accordance with applicable maintenance manual while observing all relevant work health and safety (WHS) requirements
- 1.4 Defects are correctly identified and reported
2. Test/adjust light aircraft AC instrument systems, power supplies and components
- 2.1 Aircraft and system are prepared in accordance with applicable maintenance manual for the application of power/system operation
- 2.2 Instrument system and AC power supply 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 light aircraft AC instrument systems, power supplies and components
- 3.1 Available information from maintenance documentation, 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, using test sets, downloaded maintenance data and fault-finding charts or similar, to line replacement level
- 3.3 Specialist advice is obtained, where required, to assist with the troubleshooting process
- 3.4 Instrument system or power supply faults are located and the causes of the faults are clearly identified and correctly recorded in maintenance documentation, where required, in accordance with standard enterprise procedures
- 3.5 Rectification requirements are determined
4. Remove and install light aircraft AC instrument system, and power supply 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 Instrument or power supply component removal is carried out in accordance with the applicable maintenance manual while observing all relevant WHS requirements
- 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 Instrument or power supply components to be installed are checked to confirm correct part numbers, modification status, serviceability and shelf life
- 4.6 Physical installation of instrument or power supply components is performed in accordance with the applicable maintenance manual and regulatory requirements, ensuring appropriate adjustment/alignment 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
No information
No information
Replaces
| State Code | National Code | Title | Type |
|---|---|---|---|
| D4451 | MEA281A | Maintain light aircraft AC powered instrument systems and components | Unit of competency |
Replaced By
| State Code | National Code | Title | Type |
|---|---|---|---|
| OEG92 | MEAAVI0051 | Maintain light aircraft AC-powered instrument systems and components | Unit of competency |
| State Code | National Code | Title | Type |
|---|---|---|---|
| BDX7 | MEA41018 | Certificate IV in Aeroskills (Mechatronics) | Qualification |
| AVN4 | MEA41015 | Certificate IV in Aeroskills (Mechatronics) | Qualification |