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Elements and Performance Criteria

1. Inspect secondary radar systems and components
   • Relevant maintenance documentation and modification status, including system defect reports, where relevant, are used to identify specific inspection requirements
   • Isolation tags are checked and aircraft configured for safe system inspection and operation in accordance with the applicable maintenance manual
   • Secondary radar system 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
   • Defects are correctly identified and reported
2. Test/adjust secondary radar systems and components
   • Aircraft and system are prepared in accordance with applicable maintenance manual for the application of power/system operation
   • Secondary radar system is functionally tested in accordance with maintenance manual for evidence of serviceability or malfunction while observing WHS requirements relating to ground testing
   • System calibration or adjustments are performed in accordance with maintenance manual, as appropriate
3. Troubleshoot secondary radar systems
   • Available information from maintenance documentation, inspection and test results is used, where necessary, to assist in fault determination
   • Maintenance manual fault diagnosis guides and logic processes are used to ensure efficient and accurate troubleshooting to line replacement level
   • Specialist advice is obtained, where required, to assist with the troubleshooting process
   • Secondary radar system faults are located and the causes of the faults are clearly identified and correctly recorded in maintenance documentation, where required
   • Rectification requirements are determined

Range Statement

This field allows for different work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included.
Secondary radar systems include:	Air traffic control (ATC) transponder Radio altimeter Distance measuring equipment (DME) Doppler navigation system Airborne collision avoidance system (ACAS) Automatic dependent surveillance-broadcast (ADS-B)
Procedures and requirements include:	Industry standard procedures specified by manufacturers, regulatory authorities or the enterprise

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Performance Evidence

Evidence required to demonstrate competency in this unit must be relevant to and satisfy all of the requirements of the elements and performance criteria under the specified conditions of assessment, and must include:

applying relevant WHS practices

using 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:

DME components and interface

radio altimeters

ATC transponders

doppler navigation system

ACAS

ADS-B

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.

It is essential that system testing procedures, cleanliness requirements and safety precautions applicable to the electrical system being maintained are fully observed, understood and complied with. Ability to interpret inspection procedures and specifications (allowable limits) and apply them in practice across a range of inspection, testing and troubleshooting applications (including the timely involvement of supervisors or other trades) 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 Assessment Conditions.

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Knowledge Evidence

Evidence required to demonstrate competency in this unit must be relevant to and satisfy all of the requirements of the elements and performance criteria and include 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

ADS-B

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

basic alternating current (AC) and direct current (DC) circuit theory

digital fundamentals

analogue fundamentals

radar fundamentals

transmission lines, waveguide and antenna characteristics

pulse system maintenance requirements and troubleshooting procedures

relevant WHS practices

relevant maintenance manuals

relevant regulatory requirements and standard procedures.

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