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Elements and Performance Criteria

1. Determine requirements
   • Component defect reports (removal tags) or customer order are correctly interpreted and matched by part and serial numbers
   • Ancillary section components are inspected and/or operated through prescribed test procedures to establish serviceability and confirm defects, if necessary
   • Modification status is clearly established to assist in determining the overhaul requirements for the components
   • Extent of overhaul or repair is identified and documented in accordance with standard enterprise procedures
2. Troubleshoot ancillary section components
   • Available information from maintenance records and test results is used, where necessary, to assist in fault determination
   • Logical processes are used to ensure efficient and accurate troubleshooting
   • Specialist advice is obtained, where required, to assist with, or confirm, the fault and rectification requirement
   • Ancillary section component/module faults are located and the causes of the faults are clearly identified
   • Fault rectification requirements are determined to assist in planning the repair
3. Dismantle and inspect ancillary section component parts
   • Ancillary section component parts are dismantled in accordance with maintenance manual while observing all relevant work health and safety (WHS) requirements, including the use of material safety data sheets (MSDS) and items of personal protective equipment (PPE)
   • Component parts are assessed for serviceability in accordance with the relevant maintenance documentation
   • Parts requiring specialist repair are tagged and repair instructions are specified in accordance with standard enterprise procedures
   • Parts requiring non-destructive testing (NDT) are prepared for testing in accordance with the relevant maintenance documentation
   • Parts lists are compiled and processed in accordance with standard enterprise procedures
4. Repair and/or modify ancillary section components or parts
   • Component parts are repaired or replaced in accordance with the relevant maintenance documentation
   • Modification of components is undertaken, where required, by reference to relevant manufacturers’ bulletins or procedures and/or customer requirements
5. Assemble and adjust ancillary section components
   • Ancillary section component parts are assembled within specified tolerances and in accordance with the appropriate maintenance documents while observing all relevant WHS requirements, including the use of MSDS and items of PPE
   • Support/safety equipment, where fitted, is removed at the appropriate time
   • Components are adjusted to ensure that fits and clearances are within prescribed specifications
   • Finished components are tagged, sealed and packaged in accordance with standard enterprise procedures
   • 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.
Ancillary section components include:	Accessory (or high-speed) gearbox Turboprop reduction gearbox (where applicable to the enterprise) Turboshaft drive shaft or reduction gearbox (where applicable to the enterprise)
Repair of component parts includes:	Finishing or re-finishing of metal surfaces through processes, such as polishing and lapping Replacement of seals and gaskets Replacement of bearings Application of surface treatments Restoration of paint finishes
Testing and adjustment:	Complex testing and adjusting of components, where required, will be carried out under supervision at the appropriate level
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 procedures

using relevant MSDS and items of PPE

using relevant maintenance documentation, specifications and aircraft/component manuals to:

recognise state of serviceability and overhaul or repair requirements for ancillary section components

test and accurately and efficiently troubleshoot ancillary section component unserviceabilities and document the causes

dismantle and inspect ancillary section component parts for serviceability and identify repair requirements as applicable

repair/replace/modify ancillary section component parts

assemble and adjust ancillary section components

correctly tagging, sealing and packaging completed components.

The underlying skills inherent in this unit should be transferable across a range of repair and/or overhaul applications associated with gas turbine engine components and/or modules. It is essential that the maintenance procedures (including the use of correct fuels and lubricants) are interpreted and applied to ensure quality and safety standards are achieved.

This shall be demonstrated through application across a number of different gas turbine engine components and/or modules. Ability to assess component/module serviceability and interpret parts requirements will be necessary to supplement the required evidence. Capability to interpret inspection procedures and specifications (allowable limits) and apply them in practice is critical.

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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:

how to obtain relevant MSDS

the use of applicable items of PPE

WHS procedures

fault diagnosis techniques

ancillary section and component operation

repair and overhaul procedures and processes, including inspection, rework, repair and reclamation, assembly and final adjustment.

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