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Elements and Performance Criteria

1. Prepare for troubleshooting
   • Relevant maintenance documentation and modification status, including system defect reports where relevant, are used to identify an unserviceability
2. Test/adjust RF navigation and communications systems
   • Aircraft and system are prepared in accordance with applicable maintenance manual for the application of power/system operation
   • RF navigation or communication system is functionally tested in accordance with maintenance manual for evidence of serviceability or malfunction while observing all relevant work health and safety (WHS) requirements
   • System calibration or adjustments are performed in accordance with maintenance manual, as appropriate
3. Troubleshoot RF navigation and communications systems
   • Available information from maintenance documentation and 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
   • RF navigation or communication system faults are located and the causes 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.
RF navigation or communication systems include:	Control and sensing associated with cockpit radio, ground and flight crew communications including frequency modulation (FM) and amplitude modulation (AM) modes of operation in the high frequency (HF), ultra-high frequency (UHF), and very high frequency (VHF) bands, microwave systems and satellite communications (SATCOM) Passenger communications, cockpit voice recorder (CVR), audio integration system, cabin intercommunication data systems and cabin network services (where applicable to the enterprise) Information systems, such as air traffic and information management systems, and network server systems (where applicable to the enterprise) Instrument landing system (ILS), very high frequency omni-range (VOR), automatic direction finding (ADF), global navigation system (GNS), emergency beacons and aircraft communications addressing and reporting system (ACARS) Antennae, impedance audio matching devices, microphones and headphones, transmission lines, computer controls, line replaceable units, transmitters/receivers and indicators
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 RF and communications system being maintained

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

external communications systems:

HF

UHF

VHF

SATCOM and microwave

internal communications systems, including:

intercommunication

cabin intercommunication data systems (where applicable to the enterprise)

cabin network services (where applicable to the enterprise)

CVR

information systems, such as air traffic and information management systems, and network server systems (where applicable to the enterprise)

RF navigation systems:

ILS

VOR

ADF

GNS

ACARS

ELT systems

applying logic processes, taking and interpreting system measurements to accurately and effectively isolating malfunctions within the systems

performing system testing to isolate system faults and assess post-maintenance serviceability.

It is essential that system testing procedures, cleanliness requirements and safety precautions applicable to the aircraft communication and RF navigation 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 testing and troubleshooting is essential. This is to be demonstrated through application across a range of aircraft communication and RF navigation 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

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

external communications systems:

HF

UHF

VHF

SATCOM and microwave

internal communications systems, including:

intercommunication

cabin intercommunication data systems (where applicable to the enterprise)

cabin network services (where applicable to the enterprise)

CVR

information systems, such as air traffic and information management systems, and network server systems

RF navigation systems:

ILS

VOR

ADF

GNS

ACARS

ELT systems

explaining basic principles/functions relating to the above systems and associated with:

electromagnetic radiation and propagation

basic AC and DC circuit theory

digital fundamentals

analogue fundamentals

antenna characteristics

transmission line characteristics

WHS requirements

system and component maintenance requirements and troubleshooting procedures

relevant maintenance manuals

relevant regulatory requirements and standard procedures.

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