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Elements and Performance Criteria

  1. Inspect DC aircraft electrical systems and components
  2. Test/adjust DC aircraft electrical systems
  3. Troubleshoot DC aircraft electrical systems

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.

DC electrical systems/components include:

DC generators and alternator/rectifier generators, and components of related single generator regulation and distribution systems

Piston engine ignition and starting system components

Specific components of DC electrical systems, such as flaps and landing gear, including related motors and actuators

Gas turbine engine igniter and starting systems and components (where applicable to the enterprise)

Aircraft lighting

Aircraft main batteries

Procedures and requirements include:

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


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:

recognition of system and component defects/external damage, correct installation, connection of plugs, terminations, attaching hardware (including cabling/harnesses) 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 switches/start switches

ignition harnesses

low tension wiring

spark plugs

auxiliary starting devices

gas turbine engine ignition and starting systems (where applicable to the enterprise):

starter motors and starter/generators

high energy ignition units

control units

switches

batteries and associated mounting equipment, including related anti-vibration aids

motors and actuators in DC electrical systems

internal/external lighting systems, including controls

flap systems

landing gear systems

applying logic processes, taking and interpreting electrical measurements, and 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 WHS practices, including those relating to gas turbine engine high energy ignition units.

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 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 of Conditions.


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:

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

alternator/rectifier generators

starter/generators

voltage regulators

circuit protection devices

bus bars

piston engine ignition and starting systems and components, including:

magnetos or coils

starter motors

ignition switches/start switches

ignition harnesses

low tension wiring

spark plugs

auxiliary starting devices

gas turbine igniter and starting systems and components, including specific WHS precautions:

starter motors and starter/generators

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 anti-vibration aids

relevant WHS practices

relevant maintenance manuals

relevant regulatory requirements and standard procedures.