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Elements and Performance Criteria

1. Inspect inertial navigation and reference systems and components
   • Isolation tags are checked and aircraft configured for safe system inspection and operation in accordance with the applicable maintenance manual
   • Inertial navigation and reference 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 inertial navigation and reference systems and components
   • Aircraft and system are prepared in accordance with applicable maintenance manual for the application of power/system operation
   • Inertial navigation and reference system is functionally tested in accordance with maintenance manual for evidence of serviceability or malfunction
   • System calibration or adjustments are performed in accordance with maintenance manual, as appropriate
3. Prepare for troubleshooting
   • Relevant maintenance documentation and modification status, including system defect reports, where relevant, are used to identify an unserviceability
4. Troubleshoot inertial navigation and reference 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 replaceable level
   • Specialist advice is obtained, where required, to assist with the troubleshooting process
   • Inertial navigation and reference 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.
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 inertial navigation and reference systems being maintained

recognition of system and component defects/external damage, correct installation, connection of plugs, terminations, attaching hardware (including cabling/harnesses) and security in inertial navigation and reference system components

applying logic processes, take and interpret system measurements, use test equipment and appropriate wiring diagrams and manuals to isolate system malfunctions

performing system functional tests and checks to isolate system faults and assess post-maintenance serviceability.

It is essential that system testing procedures, cleanliness requirements and safety precautions applicable to the pulse 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 an inertial navigation and reference system and its components.

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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

connection of hardware

the basic layout (block diagram level), function and operation of inertial navigation and reference systems

the operating principles of inertial navigation and reference systems:

terminology

fundamental principles of inertial navigation

two degree of freedom systems

semi-analytical systems

strapdown systems

ring laser gyroscopes

the various methods of navigation and how they are used by both aircraft conventional and electronic navigational instruments and systems

maintenance requirements and troubleshooting procedures

relevant WHS practices

relevant maintenance manuals

relevant regulatory requirements and standard procedures.

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