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 ILS systems and components.

Applications include fixed and rotary wing aircraft that have ILS systems.

MEA206C

Remove and install basic radio communication and navigation system components

MEA207C

Remove and install aircraft electronic system components

MEA246C

Fabricate and/or repair aircraft electrical components or parts

1. Inspect ILS 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. ILS 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 ILS and components

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

2.2. ILS 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 ILS

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. ILS 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

Required skills

Look for evidence that confirms skills in:

applying relevant OHS practices

using approved maintenance documentation and aircraft publications relating to the ILS being maintained

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

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

performing system testing to isolate system faults 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 the system

integration with other avionic systems

the location and operation of ground:

marker beacons

localiser transmitter

glideslope transmitter

ILS maintenance requirements and troubleshooting procedures

relevant OHS practices

basic principles/functions relating to the system and associated with:

electromagnetic radiation and propagation

basic AC and DC circuit theory

digital fundamentals

analogue fundamentals

transmitter and receiver principles

antenna characteristics

transmission line characteristics

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 ILS 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 aircraft ILS 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 a range of ILS systems and components. 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 an ILS system and at least one major system component/LRU. 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 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.

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

This unit contains employability skills.