Required skills

Look for evidence that confirms skills in

recognition of system and component defectsexternal damage correct installation connection of plugs terminations attaching hardware including cablingharnesses and security in

DC power generation systems including regulation distribution and control

battery installations

piston engine ignition and starting systems and components

magnetos or coils

starter motors

ignition switchesstart switches

ignition harnesses

low tension wiring

spark plugs

auxiliary starting devices

gas turbine engine ignition and starting systems

starter motors and startergenerators

high energy ignition units

control units

switches

batteries and associated mounting equipment including related antivibration aids

motors and actuators in DC electrical systems

internalexternal lighting systems including controls

flap systems

landing gear systems

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

performing system functional tests and checks to isolate system faults and assess post maintenance serviceability

applying relevant OHS practices including those relating to gas turbine engine high energy ignition units

Required knowledge

Look for evidence that confirms knowledge of

DC circuit theory

electrical system maintenance requirements and troubleshooting procedures

the basic layout block diagram level function and operation of

single generator DC power generation and distribution systems and components including

DC generators

alternatorrectifier generators

startergenerators

voltage regulators

circuit protection devices

bus bars

piston engine ignition and starting systems and components including

magnetos or coils

starter motors

ignition switchesstart switches

ignition harnesses

low tension wiring

spark plugs

auxiliary starting devices

gas turbine igniter and starting systems and components including specific OHS precautions

starter motors and startergenerators

high energy ignition units

control units

switches

landing gear and flap systems and components including

motors

actuators

selector switches

micro switches

internal and external lighting systems and components

batteries and associated mounting equipment including related antivibration aids

relevant OHS practices

relevant maintenance manuals

relevant regulatory requirements and standard procedures

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 inspect test and troubleshoot basic DC electrical systems and components including looms cables and connection hardware while observing 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 supervisors or other trades associated with aircraft electrical systems and components It is essential that system testing procedures cleanliness requirements and safety precautions applicable to the system being maintained are fully observed understood and complied with Ability to interpret inspection procedures and specifications allowable limits and apply them in practice is critical

Evidence of transferability of skills and knowledge related to inspection testing and troubleshooting is essential This is to be demonstrated through application across a range of aircraft electrical systems and components listed in the Range Statement The application of testing procedures should clearly indicate knowledge of system operation the relationship of individual components and the links with other systems if applicable 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 electrical looms cables and connection hardware and on each system in Range Statement Groups to Group may be omitted if not applicable to the enterprise and on at least one major componentLRU in each case For Group competency may be demonstrated through the performance of a battery check 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 workplace or simulated workplace using tools and equipment specified in the maintenance manuals It is also expected that general and special purpose tools test and ground support equipment would be used where appropriate

Method of assessment

Guidance information for assessment

Individuals being assessed who have already attained MEAA Maintain basic light aircraft electrical systems and components will have satisfied the requirements of this unit with regard to common Range Statement variables Log of Industrial Experience and Achievement records relating to MEAA Maintain basic light aircraft electrical systems and components may be accepted as also meeting the evidence requirements for this unit in the applicable common areas

Individuals being assessed who have already attained MEA274A Maintain basic light aircraft electrical systems and components, will have satisfied the requirements of this unit with regard to common Range Statement variables. Log of Industrial Experience and Achievement records relating to MEA274A Maintain basic light aircraft electrical systems and components, may be accepted as also meeting the evidence requirements for this unit in the applicable common areas.

Note

DC electrical systems

Troubleshooting

Procedures and requirements