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Evidence Guide: MEA227 - Test and troubleshoot aircraft electrical 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!

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MEA227 - Test and troubleshoot aircraft electrical 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 used to identify an unserviceability
Relevant maintenance documentation and modification status, including system defect reports, where relevant, are used to identify an unserviceability

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Test/adjust electrical systems

  1. Aircraft and system are prepared in accordance with applicable maintenance manual for the application of power/system operation
  2. Electrical system is functionally tested in accordance with maintenance manual for evidence of serviceability or malfunction while observing all relevant work health and safety (WHS) requirements
  3. System calibration or adjustments are performed in accordance with maintenance manual, as appropriate
Aircraft and system are prepared in accordance with applicable maintenance manual for the application of power/system operation

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Electrical system is functionally tested in accordance with maintenance manual for evidence of serviceability or malfunction while observing all relevant work health and safety (WHS) requirements

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

System calibration or adjustments are performed in accordance with maintenance manual, as appropriate

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Troubleshoot electrical systems

  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 guides and logic processes are used to ensure efficient and accurate troubleshooting to line replacement level
  3. Specialist advice is obtained, where required, to assist with the troubleshooting process
  4. System faults are located and the causes of the faults are clearly identified and correctly recorded in maintenance documentation, where required
  5. Rectification requirements are determined
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 guides and logic processes are used to ensure efficient and accurate troubleshooting to line replacement level

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

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

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

System faults are located and the causes of the faults are clearly identified and correctly recorded in maintenance documentation, where required

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Rectification requirements are determined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1.

Prepare for troubleshooting

1.1

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

2.

Test/adjust electrical systems

2.1

Aircraft and system are prepared in accordance with applicable maintenance manual for the application of power/system operation

2.2

Electrical system is functionally tested in accordance with maintenance manual for evidence of serviceability or malfunction while observing all relevant work health and safety (WHS) requirements

2.3

System calibration or adjustments are performed in accordance with maintenance manual, as appropriate

3.

Troubleshoot electrical systems

3.1

Available information from maintenance documentation and inspection and test results is used, where necessary, to assist in fault determination

3.2

Maintenance manual fault diagnosis guides and logic processes are used to ensure efficient and accurate troubleshooting to line replacement level

3.3

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

3.4

System faults are located and the causes of the faults are clearly identified and correctly recorded in maintenance documentation, where required

3.5

Rectification requirements are determined

Required Skills and Knowledge

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1.

Prepare for troubleshooting

1.1

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

2.

Test/adjust electrical systems

2.1

Aircraft and system are prepared in accordance with applicable maintenance manual for the application of power/system operation

2.2

Electrical system is functionally tested in accordance with maintenance manual for evidence of serviceability or malfunction while observing all relevant work health and safety (WHS) requirements

2.3

System calibration or adjustments are performed in accordance with maintenance manual, as appropriate

3.

Troubleshoot electrical systems

3.1

Available information from maintenance documentation and inspection and test results is used, where necessary, to assist in fault determination

3.2

Maintenance manual fault diagnosis guides and logic processes are used to ensure efficient and accurate troubleshooting to line replacement level

3.3

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

3.4

System faults are located and the causes of the faults are clearly identified and correctly recorded in maintenance documentation, where required

3.5

Rectification requirements are determined

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 the electrical system being maintained

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

AC and DC power generation systems, including regulation, distribution, control and cooling

battery installations

flight control and/or electro-hydraulic systems

engine ignition, starting, fuel distribution and control systems

internal/external lighting systems, including controls

landing gear systems

anti-skid braking systems

auxiliary systems, including ice/rain protection, fire detection, environmental control and pressurisation, water and waste, doors, propeller control, equipment and furnishings

equipment cooling and ventilation systems

master caution and warning systems

applying logic processes, taking and interpreting electrical measurements, and using test equipment and appropriate wiring diagrams and manuals to isolate electrical system malfunctions of the above components and systems

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 electrical 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 testing and troubleshooting is essential. This is to be demonstrated through application across a range of aircraft electrical systems and components listed in the Assessment Conditions.

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

explaining the basic layout (block diagram level), function and operation of:

AC and DC power generation systems, including regulation, distribution, control and cooling

battery installations

flight control and/or electro-hydraulic systems

engine ignition, starting, fuel distribution and control systems

internal/external lighting systems, including controls

landing gear systems

anti-skid braking systems

auxiliary systems, including ice/rain protection, fire detection, environmental control and pressurisation, water and waste, doors, propeller control, equipment and furnishings

equipment cooling and ventilation systems

master caution and warning systems

explaining basic principles/functions, relating to systems listed above and associated with:

basic AC and DC circuit theory

digital fundamentals

analogue fundamentals

AC and DC generator characteristics

single and polyphase AC motors and DC motors

rotary and static inverters

air cycle air conditioning

electrical sensing and transmitting devices

WHS requirements applicable to the maintenance of aircraft electrical systems, including gas turbine engine high-energy ignition units

electrical system maintenance requirements and troubleshooting procedures

relevant maintenance manuals

relevant regulatory requirements and standard 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.

Electrical systems and components include:

All related electrical hardware, looms and cables

Alternating current (AC) and/or direct current (DC) power generation, regulation and distribution systems

Rotary and static inverters and transformer rectifier (TR) units

Air cycle air conditioning and pressurisation systems

Flight and engine control systems

Ignition and starting systems

Fire/smoke detection and extinguishing

Lighting (internal and external)

Master and caution warning systems

Equipment cooling and ventilation

Equipment and furnishing

Position indicating systems

Fuel storage and distribution

Landing gear indication and anti-skid

Main batteries and battery bus ties/interlocks

Propeller control systems (where applicable to the enterprise)

Ice and rain protection (where applicable to the enterprise)

Wastewater (where applicable to the enterprise)

Procedures and requirements include:

Industry standard procedures specified by manufacturers, regulatory authorities or the enterprise