List the assessment methods to be used and the context and resources required for assessment. Copy and paste the relevant sections from the evidence guide below and then re-write these in plain English.
Elements describe the essential outcomes. | Performance criteria describe the performance needed to demonstrate achievement of the element. |
1. | Remove oxygen system components | 1.1 | Oxygen system is rendered safe and prepared in accordance with the applicable maintenance manual and isolation tags are fitted, where necessary, to ensure personnel safety |
| | 1.2 | Removal of oxygen system components is carried out in accordance with the applicable maintenance manual while observing all relevant work health and safety (WHS) requirements |
| | 1.3 | Required maintenance documentation is completed and processed in accordance with standard enterprise procedures |
| | 1.4 | Removed components are tagged, packaged or discarded in accordance with specified procedures |
2. | Install aircraft oxygen system components | 2.1 | Oxygen system components to be installed are checked to confirm correct part numbers, modification status, serviceability and shelf life |
| | 2.2 | Oxygen system components to be installed are free from contamination and inspected for damaged flair ends and fittings |
| | 2.3 | Component installation is physically carried out in accordance with the applicable maintenance manual while observing all relevant WHS requirements |
| | 2.4 | System is reinstated to correct physical condition in preparation for testing, as necessary |
| | 2.5 | Required maintenance documentation is completed and processed in accordance with standard enterprise procedures |
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.
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.
Competency should be assessed in the workplace or simulated workplace using tools and equipment specified in the maintenance manuals. It is expected that dedicated tools, test and ground support equipment is used in routine oxygen situations.
An understanding of the attachment methods, connection hardware, and the need for adjustment or rigging and system operation as it relates to the work must be demonstrated before undertaking any action. The work plan should take account of applicable safety and quality requirements in accordance with the industry and regulatory standards.
The following conditions of assessment represent the requirements of the Regulators (ADF and CASA) and maintenance stakeholders and must be rigorously observed.
A person cannot be assessed as competent until it can be demonstrated to the satisfaction of the workplace assessor that the relevant elements and performance criteria of the unit of competency are being achieved under routine supervision on at least one (1) item from each of:
oxygen pressure cylinders, valves and gauges
regulators, masks (including other integrated systems), pipes, hoses and fittings
chemical generators (may be omitted where they are not applicable to the enterprise)
LDBO converters (may be omitted where they are not applicable to the enterprise).
This shall be established via the records in the Log of Industrial Experience and Achievement or, where appropriate, an equivalent industry Evidence Guide (for details refer to the Companion Volume Assessment Guidelines).
Assessors must satisfy the requirements of the National Vocational Education and Training Regulator (Australian Skills Quality Authority, or its successors).
Where the unit is to be used for CASA licensing purposes the Assessor must also meet the criteria specified in the CASR Part 147 Manual of Standards.