Google Links

Follow the links below to find material targeted to the unit's elements, performance criteria, required skills and knowledge

Elements and Performance Criteria

1. Prepare for troubleshooting
   • Relevant maintenance documentation and modification status, including system defect reports where relevant, are interpreted to identify an unserviceability.
2. Test gas turbine engine system.
   • Aircraft and gas turbine engine system are correctly prepared in accordance with applicable maintenance manual and connected to appropriate test equipment.
   • Built-in system test functions and status displays are activated, where applicable, outputs recorded and interpreted.
   • Assistance is provided with gas turbine engine and/or system operation during prescribed test procedures to establish serviceability and correct function in accordance with applicable maintenance manual.
3. Troubleshoot gas turbine engine system
   • Available information from maintenance documentation and inspection and test results is used, where necessary, to assist in fault determination.
   • Maintenance manual fault diagnosis guide and logical processes are used to ensure efficient and accurate troubleshooting.
   • Specialist advice is obtained, where required, to assist with the troubleshooting process.
   • Gas turbine engine system faults are located and causes of the faults are clearly identified and correctly recorded in maintenance documentation, where required.
   • Fault rectification requirements are determined to assist in planning the repair or adjustment.

Required Skills

Required skills

Look for evidence that confirms skills in Application of relevant OHampS procedures The use of relevant maintenance documentation and aircraft manuals to recognise through visualphysical inspection external and internal signs of defects in gas turbine engines components and system components assist with testing of gas turbine engine and engine system operation be able to operate systems monitor indications record parameters and recognise correct function compile engine condition monitoring records rig and adjust engine controls and systems Using fault diagnosis guides and equivalent data to accurately and efficiently troubleshoot the causes of unserviceabilities in gas turbine engines and engine systems clearly record details and identify the required rectification actions

Required knowledge

Look for evidence that confirms knowledge of Fault diagnosis techniques Gas turbine engine and engine system layout and operation System component operation including electrical and instrument system interfaces

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 apply hand skills use maintenance publications and engine and system theory knowledge to test and troubleshoot gas turbine engines and engine system components on fixed or rotary wing aircraft while applying 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 supervisor or other trades associated with engine systems It is essential that system test procedures take into account all safety precautions associated with gas turbine engine system operation especially with regard to highenergy ignition units and that awareness be demonstrated of dual inspection requirements associated with work on engine control systems Evidence of transferability of skills and knowledge related to testing and troubleshooting is essential This may be demonstrated through application across a number of engine systems or engine types The application of testing procedures and functional rigging checks should also indicate knowledge of system operation Engine system operation knowledge the relationship of individual components and the links with other systems will be necessary to supplement evidence of ability to carry out rigging checks and troubleshoot the system within the limits of the aircraftsystem 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 at least one item from each of Groups to in the Range Statement This shall be established via the records in the Log of Industrial Experience and Achievement or where appropriate an equivalent Industry
Context of and specific resources for assessment	Competency should be assessed in the work environment or simulated work environment using tools and equipment specified in aircraft maintenance manuals It is also expected that general purpose tools test and ground support equipment found in most routine situations would be used where appropriate The level of troubleshooting is limited in its application to the use of fault diagnosis guides or other similar information
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.
Note	Range statements listed below are numbered to facilitate specification of the assessment requirements included in the Evidence Guide.
Gas turbine engine systems	Gas turbine engine systems may include: 1. Engine change unit, main components, accessories/drives 2. Control system 3. Ignition, starter systems. 4. Fuel system 5. Oil system 6. Air system
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

---