Unit of competency Outline
Date retreived
22/07/2026 9:46 AM AWST
22/07/2026 9:46 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.
Inspect, test and troubleshoot aircraft hydro-mechanical and landing gear systems and components
Inspect, test and troubleshoot aircraft hydro-mechanical and landing gear systems and components
Unit of competency
National Code
MEA309C
MEA309C
State Code
D4424
D4424
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
120
Description
This unit of competency is part of the Mechanical Certificate IV (Aircraft Maintenance Stream) training pathway. It covers the competencies required to inspect, test and troubleshoot aircraft hydro-mechanical and landing gear systems and components. This unit is used in workplaces that operate under the airworthiness regulatory systems of the ADF and CASA.Where a CASA licensing outcome is sought this unit forms part of the CASA requirement for the granting of the chosen 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 hydro-mechanical systems and components
- 1.1. Isolation tags already attached to the system or related systems are checked and aircraft configured for safe system inspection and operation in accordance with specified procedures
- 1.2. Hydro-mechanical system and system components are visually or physically checked for external signs of defects in accordance with specified procedures
2. Inspect landing gear systems and components
- 2.1. Isolation tags already attached to the system or related systems are checked and aircraft configured, including jacking, where necessary, for safe system inspection and operation in accordance with specified procedures
- 2.2. Landing gear system and system components are visually or physically checked for external signs of defects in accordance with specified procedures
3. Test hydro-mechanical and landing gear systems
- 3.1. The aircraft and hydro-mechanical systems are correctly prepared in accordance with specified procedures for the application of power
- 3.2. Power is applied and system functionally tested in accordance with specified procedures for evidence of malfunction or leaks
- 3.3. System calibration or adjustments are performed in accordance with specified procedures
4. Prepare for troubleshooting
- 4.1. Relevant maintenance documentation and modification status, including system defect/ service difficulty reports where relevant, are interpreted to identify an unserviceability
5. Troubleshoot hydro-mechanical and landing gear systems
- 5.1. Available information from maintenance documentation and inspection and test results is used, where necessary, to assist in fault determination
- 5.2. Maintenance manual fault diagnosis guide and logical processes are used to ensure efficient and accurate troubleshooting
- 5.3. Specialist advice is obtained, where required, to assist with the troubleshooting process
- 5.4. Hydro-mechanical and landing gear system faults are located and the causes of the faults are clearly identified and correctly recorded in maintenance documentation, where required
- 5.5. Fault rectification requirements are determined to assist in planning the repair or adjustment
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
Systems and system components
Hydro-mechanical systems include:
1. Hydraulic systems
2. Fuel systems
Components of hydro-mechanical systems include:
3. Hydraulic accumulators, filters, reservoirs, valves, pumps, motors, actuators, regulators and direct reading gauges
4. Fuel system filters, valves, pumps, rigid and flexible storage cells/tanks
5. Rigid and flexible pipelines, hoses and fittings
Landing gear systems include:
6. Retraction systems
7. Steering systems
8. Brake systems, including anti-skid, where applicable
Landing gear components include:
9. Wheel assemblies, skids and floats
10. Brake units
11. Struts/oleos
(Additional components of landing gear systems are included in hydro-mechanical system components)
Troubleshooting
Troubleshooting involves the use of fault finding charts or similar, to line replacement level
Application
Application of this unit of competency 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
Electrical interface
The work can include associated electrical loom terminations and/or plugs
Note
Range statements listed below are numbered to facilitate specification of the assessment requirements included in the Evidence Guide
Systems and system components
Hydro-mechanical systems include:
1. Hydraulic systems
2. Fuel systems
Components of hydro-mechanical systems include:
3. Hydraulic accumulators, filters, reservoirs, valves, pumps, motors, actuators, regulators and direct reading gauges
4. Fuel system filters, valves, pumps, rigid and flexible storage cells/tanks
5. Rigid and flexible pipelines, hoses and fittings
Landing gear systems include:
6. Retraction systems
7. Steering systems
8. Brake systems, including anti-skid, where applicable
Landing gear components include:
9. Wheel assemblies, skids and floats
10. Brake units
11. Struts/oleos
(Additional components of landing gear systems are included in hydro-mechanical system components)
Troubleshooting
Troubleshooting involves the use of fault finding charts or similar, to line replacement level
Application
Application of this unit of competency 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
Electrical interface
The work can include associated electrical loom terminations and/or plugs
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 a range of hydraulic and fuel system and landing gear components that are representative of the scope of the listed variables in accordance with relevant maintenance manual instructions while applying all relevant OHS procedures and standard procedures. Coverage of brakes and struts/oleos are not required where the aircraft is rotary wing and is fitted with skids or floats.
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 aircraft hydro-mechanical and landing gear systems and their components.
It is essential that system test procedures take into account all safety precautions applicable to the system being maintained, especially where system operation/switching inter-relates to other systems being maintained. 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 is essential. This may be demonstrated through application across a number of aircraft systems or aircraft types. 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 (including safe handling of heavy components) 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 this unit of competency are being achieved under routine supervision on:
each type of system (Groups 1, 2, 6, 7, 8)
on at least one component of each group listed in the Range Statement against hydro-mechanical system components 3 to 5
landing gear system components 9 to 11
Where the aircraft is rotary wing and is fitted with skids or floats coverage of Groups 6, 7, 8, 10 and 11 is not required and where a rotary wing aircraft is fitted with a fixed undercarriage with wheels coverage of Groups 6 and 7 is not required. 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 procedures, tools and equipment specified in maintenance documentation. It is also expected that general purpose tools, test and ground support equipment found in most routine situations would be used where appropriate. The level of troubleshooting is limited in its application to the use of fault diagnosis guides or other similar information.
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 a range of hydraulic and fuel system and landing gear components that are representative of the scope of the listed variables in accordance with relevant maintenance manual instructions while applying all relevant OHS procedures and standard procedures. Coverage of brakes and struts/oleos are not required where the aircraft is rotary wing and is fitted with skids or floats.
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 aircraft hydro-mechanical and landing gear systems and their components.
It is essential that system test procedures take into account all safety precautions applicable to the system being maintained, especially where system operation/switching inter-relates to other systems being maintained. 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 is essential. This may be demonstrated through application across a number of aircraft systems or aircraft types. 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 (including safe handling of heavy components) 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 this unit of competency are being achieved under routine supervision on:
each type of system (Groups 1, 2, 6, 7, 8)
on at least one component of each group listed in the Range Statement against hydro-mechanical system components 3 to 5
landing gear system components 9 to 11
Where the aircraft is rotary wing and is fitted with skids or floats coverage of Groups 6, 7, 8, 10 and 11 is not required and where a rotary wing aircraft is fitted with a fixed undercarriage with wheels coverage of Groups 6 and 7 is not required. 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 procedures, tools and equipment specified in maintenance documentation. It is also expected that general purpose tools, test and ground support equipment found in most routine situations would be used where appropriate. The level of troubleshooting is limited in its application to the use of fault diagnosis guides or other similar information.
Method of assessment
Guidance information for assessment
Replaces
| State Code | National Code | Title | Type |
|---|---|---|---|
| W8408 | MEA309B | Inspect, test and troubleshoot aircraft hydro-mechanical and landing gear systems and components | Unit of competency |
Replaced By
| State Code | National Code | Title | Type |
|---|---|---|---|
| AUF75 | MEA309 | Inspect, test and troubleshoot aircraft hydro-mechanical and landing gear systems and components | Unit of competency |
| State Code | National Code | Title | Type |
|---|---|---|---|
| S754 | MEA50210 | Diploma of Aeroskills (Mechanical) | Qualification |
| D751 | MEA50211 | Diploma of Aeroskills (Mechanical) | Qualification |
| D744 | MEA40711 | Certificate IV in Aeroskills (Mechanical) | Qualification |
| D741 | MEA30211 | Certificate III in Aeroskills (Mechatronics) | Qualification |
| D746 | MEA41011 | Certificate IV in Aeroskills (Mechatronics) | Qualification |