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Elements and Performance Criteria

1. Determine requirements
   • Display, control and distribution system component defect reports (removal tags) or customer order are correctly interpreted and matched by part and serial numbers
   • Circuitry is correctly prepared and connected to the applicable test equipment and is functionally tested or cycled through the prescribed test procedures in accordance with the maintenance documentation for evidence of serviceability or malfunction
   • Modification status is clearly established to assist in determining the overhaul requirements for the components
   • Extent of overhaul or repair is correctly identified and documented
2. Troubleshoot display, control and distribution system components
   • Available information from maintenance records 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
   • Faults are located and the causes of the faults are clearly identified and correctly recorded in maintenance documentation, where required
   • Fault rectification requirements are determined
3. Dismantle and inspect display, control and distribution system components
   • Component parts are dismantled in accordance with maintenance manuals while observing all relevant work health and safety (WHS) requirements
   • Component parts are assessed for serviceability in accordance with the relevant maintenance documentation
   • Parts requiring specialist repair are tagged and repair instructions are accurately specified
   • Parts lists are compiled and processed in accordance with standard enterprise procedures
4. Repair and/or modify display, control and distribution system components
   • Component parts are repaired or replaced in accordance with the relevant maintenance documentation
   • Modification of components or parts is undertaken, where required, by relevant manufacturers’ bulletins or procedures
5. Assemble, test and adjust display, control and distribution system components
   • Assembly of component parts is carried out in accordance with specified tolerances and the applicable maintenance documents
   • Assembled components are tested and adjusted/aligned in accordance with the applicable maintenance documentation using the appropriate test equipment
   • Required maintenance documentation and modification records are completed and processed in accordance with standard enterprise procedures

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.
Display, control and distribution system components	Display, control and distribution system components are from any or all of the following aircraft systems: display systems, including electronic flight instrument systems (EFIS), engine indicating and crew alerting system (EICAS) and electronic central aircraft monitoring (ECAM) automatic flight control system (AFCS) autopilots (digital and analogue) flight director (digital and analogue) fight management
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 repair/overhaul manuals, procedures and processes relating to aircraft display, control and distribution system components

recognising the serviceability state and repair or overhaul requirements for components from:

digital electronic instruments/display systems

digital flight controllers and directors

digital AFCS/autopilot systems

flight management systems

analogue components of control and distribution systems

applying logic processes, using test equipment and appropriate wiring diagrams and manuals to isolate component faults

performing component testing to isolate/confirm component fault and assess post-repair/overhaul serviceability

correctly aligning components listed above to operate within prescribed specifications

correctly interpreting digital instrument display indications, information and symbols.

It is essential that system testing procedures, cleanliness requirements and safety precautions applicable to the display, control and distribution system components 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, alignment and troubleshooting applications (including the timely involvement of supervisors or other trades) is critical.

Evidence of transferability of skills and knowledge related to testing, aligning and troubleshooting is essential. This may be demonstrated through application across a representative range of the 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 and system operation

the basic function and operation of components as follows to enable testing for fault isolation/confirmation, to determine repair or overhaul requirements, and serviceability status post-repair or overhaul:

digital electronic instruments/display system components

digital flight controllers and directors

digital AFCS/autopilot system components

flight management system components

analogue components of control and distribution systems

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

advanced analogue fundamentals, including video display generation techniques

digital fundamentals

alternating current (AC) and direct current (DC) electrical systems.

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