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Elements and Performance Criteria

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.

Oxygen system components include:

Oxygen pressure cylinders, valves and gauges

Regulators, masks (including other integrated systems), pipes, hoses and fittings

Chemical generators (where applicable to the enterprise)

Liquid dry breathing oxygen (LDBO) converters (where applicable to the enterprise)

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:

applying appropriate WHS practices and using approved maintenance documentation and aircraft publications relating to aircraft oxygen systems and components

demonstrating the procedure to replenish a dry breathing oxygen system, including:

correct identification of oxygen ground trolleys

maximum charging pressures for low and high pressure systems

safety precautions to be adhered to during replenishment

correct order of procedural replenishment steps

demonstrating the procedure to purge a dry breathing oxygen system, including:

reasons for the requirement to undertake a purging operation

identification of acceptable system purging gases

safety precautions to be adhered to during purging

employing correct techniques when purging oxygen storage cylinders or systems.

It is essential that oxygen system cleanliness requirements and safety precautions applicable to system component handling are fully observed, understood and complied with. These cleanliness requirements extend to all tooling and hardware associated with oxygen system maintenance.

Evidence of transferability of skills and knowledge related to removal and installation is essential. This is to be demonstrated by application across a range of aircraft oxygen system components listed in the Assessment 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:

WHS practices relevant to oxygen system maintenance

component attachment methods

connection of hardware and couplings

oxygen system isolation

the properties of aircraft oxygen and requirements for aircrew/passengers

the layout of low and high-pressure dry breathing oxygen systems and components

the methods by which gaseous dry breathing oxygen is stored in both the aircraft and within the workplace environment. Reference to storage trolleys, aircraft cylinders and chemical oxygen cylinders is required

the methods used to locate, identify and access oxygen system components for removal and installation

relevant maintenance manuals

relevant regulatory requirements and standard procedures.