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Elements and Performance Criteria

1. Inspect pneumatic systems and components
   • Isolation tags already attached to the system or related systems are checked and aircraft configured for safe system inspection and operation in accordance with specified procedures
   • Pneumatic system is visually or physically checked for external signs of defects in accordance with specified procedures while observing all relevant work health and safety (WHS) requirements
2. Test pneumatic systems
   • The aircraft and pneumatic systems are correctly prepared in accordance with specified procedures for the application of power
   • Power is applied and system functionally tested in accordance with specified procedures for evidence of malfunction or leaks
   • System calibration or adjustments are performed in accordance with specified procedures
3. Prepare for troubleshooting
   • Relevant maintenance documentation and modification status, including system defect/service difficulty reports, where relevant, are interpreted to identify an unserviceability
4. Troubleshoot pneumatic systems
   • Available information from maintenance documentation and inspection and test results is used, where necessary, to assist in fault determination
   • Maintenance manual fault diagnosis guide and logical processes are used to ensure efficient and accurate troubleshooting to line replacement level
   • Specialist advice is obtained, where required, to assist with the troubleshooting process
   • Pneumatic system faults are located and the causes of the faults are clearly identified and correctly recorded in maintenance documentation, where required
   • Fault rectification requirements are determined to assist in planning the repair or adjustment

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.
Pneumatic systems include:	De-icing Air cycle air conditioning Pressurisation Fire-extinguishing
Components of pneumatic systems include:	Filters, valves, pumps, motors, actuators and regulators Gauges (direct reading), temperature sensors, pressurisation controllers and temperature controllers Heat exchangers, pressure vessels, condensers, compressors, expansion turbines and humidifiers Rigid and flexible pipelines, hoses and fittings Ducting
Electrical interface includes:	Associated electrical loom terminations and/or plugs
Procedures and requirements include:	Industry standard procedures specified by manufacturers, regulatory authorities or the enterprise

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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:

using hand skills and tools in the inspection, adjustment and troubleshooting of pneumatic systems

using hand skills and tools in the inspection, adjustment and troubleshooting of pneumatic system components

using maintenance manuals to prepare the aircraft for inspection, testing and troubleshooting of pneumatic systems and components

effectively using maintenance documentation and relevant fault diagnosis guides in the troubleshooting process

recognising external defects in pneumatic systems and components

applying standard procedures

observing all relevant WHS practices.

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 pneumatic systems and their components. It is essential that system test procedures take into account all safety precautions applicable to the system being maintained, especially where system operation/switching interrelates to other systems being maintained.

Ability to interpret system performance specifications (allowable limits) and apply them in practice is critical and shall be demonstrated through application across the range of systems listed in the Assessment Conditions.

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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:

standard trade practices relating to tool usage and installation/securing of aircraft hardware

pneumatic system:

layout

operation and characteristics

component operation and construction

electrical and instrument system interfaces

how to configure the aircraft for inspection, testing and troubleshooting of pneumatic systems and components

pneumatic system maintenance requirements and troubleshooting procedures

WHS procedures relating to pneumatic systems and components

relevant maintenance manuals

relevant regulatory requirements and standard procedures, including those relating to the handling and control of halon fire-extinguishers.

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