This unit requires application of hand skills and the use of system/component knowledge and applicable maintenance publications and test equipment to inspect, test and troubleshoot secondary radar systems and components.

Applications include fixed and rotary wing aircraft that have secondary radar systems.

MEA207C

Remove and install aircraft electronic system components

MEA246C

Fabricate and/or repair aircraft electrical components or parts

ELEMENT

PERFORMANCE CRITERIA

1. Inspect secondary radar 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. Secondary radar system components are 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 secondary radar systems and components

2.1. Aircraft and system are prepared in accordance with applicable maintenance manual for the application of power/system operation.

2.2. Secondary radar 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 secondary radar systems.

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.

3.3. Specialist advice is obtained, where required, to assist with the troubleshooting process.

3.4. Secondary radar system faults are located and the causes of the faults are clearly identified and correctly recorded in maintenance documentation, where required.

3.5. Determine rectification requirements.

Required skills

Look for evidence that confirms skills in:

Application of relevant OHS practices

Use of approved maintenance documentation and aircraft publications relating to the pulse system being maintained

Recognition of system and component defects/external damage, correct installation, connection of plugs, terminations, attaching hardware (including cabling/harnesses/transmission lines) and security in:

distance measuring equipment (DME) components and interface

radio altimeters

air traffic control (ATC) transponders

doppler navigation system

airborne collision avoidance system (ACAS)

Applying logic processes, taking and interpreting system measurements to accurately and effectively isolate malfunctions within the systems

Testing systems to isolate system malfunctions and assess post maintenance serviceability

Required knowledge

Look for evidence that confirms knowledge of:

Component attachment methods

The basic layout (block diagram level), function and operation of:

DME including components and interface

radio altimeters

ATC transponders

doppler navigation system

ACAS

Basic principles/functions, relating to the listed systems and associated with:

basic AC and DC circuit theory

digital fundamentals

analogue fundamentals

radar fundamentals

transmission lines, waveguide and antenna characteristics

Pulse system maintenance requirements and troubleshooting procedures

Relevant OHS practices

Relevant maintenance manuals

Relevant regulatory requirements and standard procedures

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 secondary radar systems and components 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 secondary radar 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. 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 is to be demonstrated through application across secondary radar 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 at least one of the secondary radar systems in Groups 1 to 5 in the Range Statement and its major system components/ line replaceable units (LRU). 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 the maintenance manuals. It is also expected that general and special purpose tools, test and ground support equipment would be used where appropriate.

Method of assessment

Guidance information for assessment

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.

Secondary radar systems

Secondary radar systems include:

1. ATC transponder

2. Radio altimeter

3. DME

4. Doppler navigation system

5. ACAS

Troubleshooting

Troubleshooting involves the use of fault finding charts or similar, to line replacement level.

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

Unit sector

Aviation maintenance

This unit contains employability skills.