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Evidence Guide: MEA322C - Test and troubleshoot gas turbine engine systems and components

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

From the Wiki University

 

MEA322C - Test and troubleshoot gas turbine engine systems and components

What evidence can you provide to prove your understanding of each of the following citeria?

Prepare for troubleshooting

  1. Relevant maintenance documentation and modification status, including system defect reports, where relevant, are interpreted to identify an unserviceability
Relevant maintenance documentation and modification status, including system defect reports, where relevant, are interpreted to identify an unserviceability

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Test gas turbine engine system

  1. Aircraft and gas turbine engine system are correctly prepared in accordance with applicable maintenance manual and connected to appropriate test equipment
  2. Built-in system test functions and status displays are activated, where applicable, outputs recorded and interpreted
  3. 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
Aircraft and gas turbine engine system are correctly prepared in accordance with applicable maintenance manual and connected to appropriate test equipment

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Built-in system test functions and status displays are activated, where applicable, outputs recorded and interpreted

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

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

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Troubleshoot gas turbine engine system

  1. Available information from maintenance documentation and inspection and test results is used, where necessary, to assist in fault determination
  2. Maintenance manual fault diagnosis guide and logical processes are used to ensure efficient and accurate troubleshooting
  3. Specialist advice is obtained, where required, to assist with the troubleshooting process
  4. Gas turbine engine system faults are located and causes of the faults are clearly identified and correctly recorded in maintenance documentation, where required
  5. Fault rectification requirements are determined to assist in planning the repair or adjustment
Available information from maintenance documentation and inspection and test results is used, where necessary, to assist in fault determination

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Maintenance manual fault diagnosis guide and logical processes are used to ensure efficient and accurate troubleshooting

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Specialist advice is obtained, where required, to assist with the troubleshooting process

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Gas turbine engine system faults are located and causes of the faults are clearly identified and correctly recorded in maintenance documentation, where required

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Fault rectification requirements are determined to assist in planning the repair or adjustment

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

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 high-energy 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 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 at least one item from each of Groups 1 to 6 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 Evidence Guide.

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

Individuals being assessed who have already attained MEA314C Inspect, test and troubleshoot gas turbine engine systems and components, will have fully met the criteria for this unit. Log of Industrial Experience and Achievement records relating to MEA314C Inspect, test and troubleshoot gas turbine engine systems and components, may be accepted as also meeting the evidence requirements for this unit.

Required Skills and Knowledge

Look for evidence that confirms knowledge of:

fault diagnosis techniques

gas turbine engine layout and operation:

types of gas turbine

operating principles and power output

gas path

intakes

compressors

combustion chambers

turbines

exhaust

thrust reversers

accessory drives

bearings and seals

maintenance requirements and troubleshooting procedures

system and component operation, including electrical and instrument system interfaces:

fuel control and fuels

lubrication and lubricants

air distribution

starting

ignition

power augmentation

instrumentation:

performance indication

condition indication

warning

presentation and interpretation of electronic displays

fire warning and extinguishing

control system and rigging of engine controls

engine spin/run procedures including the operation of APUs

engine condition monitoring

relevant OHS practices, including the requirements for the lifting and handling of heavy components

how to obtain MSDS

selection and use of PPE

relevant maintenance manuals

relevant regulatory requirements and standard procedures

Look for evidence that confirms skills in:

applying relevant OHS procedures, including lifting and handling of heavy components

using MSDS and PPE

using relevant maintenance documentation and aircraft manuals to:

recognise through visual/physical 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

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 and accessories/drives

2. Control system

3. Ignition and 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

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