Application
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 global navigation systems and components. Applications include fixed and rotary wing aircraft. |
Prerequisites
Elements and Performance Criteria
1. Inspect GNS 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. GNS 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 GNS and components | 2.1. Aircraft and system are prepared in accordance with applicable maintenance manual for the application of power/system operation 2.2. GNS 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 GNS | 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. GNS 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
Required skills |
Look for evidence that confirms skills in: applying relevant OHS practices using approved maintenance documentation and aircraft publications relating to the GNS being maintained Recognition of system and component defects/external damage, correct installation, attaching hardware (including cabling/harnesses/transmission lines) and security in GNS applying logic processes, taking and interpreting system measurements to accurately and effectively isolate malfunctions within GNS performing system testing to isolate system faults and assess post-maintenance serviceability |
Required knowledge |
Look for evidence that confirms knowledge of: GNS principles, including the use of satellites for navigation component attachment methods the basic layout (block diagram level), function and operation of GNS, including interpretation of indicators and operation of controls 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 interface with other avionic systems, e.g. flight management systems maintenance requirements and troubleshooting procedures relevant OHS practices relevant maintenance manuals relevant regulatory requirements and standard procedures |
Evidence Required
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 GNS 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 global navigation 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. 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 a global navigation system and, in cases where the system is not replaced as a single unit, 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 |
Range Statement
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 |
Sectors
Aviation maintenance
Co-Requisites
Not applicable
Employability Skills
This unit contains employability skills. |
Licensing Information
Not applicable.