Google Links

Follow the links below to find material targeted to the unit's elements, performance criteria, required skills and knowledge

Elements and Performance Criteria

1. Inspect light piston engine aircraft pressurisation system
   • Relevant maintenance documentation and modification status, including system defect reports, where relevant, are used to identify specific inspection requirements
   • Isolation tags are checked and aircraft configured for safe system inspection and operation in accordance with the applicable maintenance manual
   • Pressurisation system components are visually or physically checked for external signs of defects in accordance with applicable maintenance manual while observing all relevant work health and safety (WHS) requirements, including the use of material safety data sheets (MSDS) and items of personal protective equipment (PPE)
   • Defects are correctly identified and reported
2. Test/adjust light piston engine aircraft pressurisation systems and components
   • Aircraft and system are prepared in accordance with applicable maintenance manual for the application of power/system operation
   • Pressurisation system is functionally tested in accordance with maintenance manual for evidence of serviceability or malfunction
   • System adjustment is performed in accordance with maintenance manual
3. Troubleshoot light piston engine aircraft pressurisation systems
   • Available information from maintenance documentation, inspection and test results is used, where necessary, to assist in fault determination
   • Maintenance manual fault diagnosis guides and logic 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
   • Pressurisation system faults are located and the causes of the faults are clearly identified and correctly recorded in maintenance documentation, where required, in accordance with standard enterprise procedures
   • Rectification requirements are determined
4. Remove and install light piston engine aircraft pressurisation system components
   • System is rendered safe in accordance with the applicable maintenance manual and isolation tags are fitted, where necessary, to ensure personnel safety
   • Pressurisation system component removal is carried out in accordance with the applicable maintenance manual while observing all relevant WHS requirements, including the use of MSDS and items of PPE
   • Required maintenance documentation is accurately completed and correctly processed
   • Removed components are tagged, sealed and packaged in accordance with specified procedures
   • Components to be installed are checked to confirm correct part numbers, serviceability and modification status
   • Installation is carried out in accordance with the applicable maintenance manual
   • Required maintenance documentation is completed and processed in accordance with standard enterprise procedures

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.
Pressurisation system components include:	Pressure controllers Outflow valves Safety valves Negative pressure relief valves Ducting
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:

using hand skills, tools and test equipment in the testing, adjustment and troubleshooting of light piston engine aircraft pressurisation systems and components, including system component removal and installation

recognising pressurisation system and component defects/external damage, correct installation and security for the types of system components listed in the Range of Conditions

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

effectively using maintenance documentation and relevant fault diagnosis guides in the troubleshooting process and for component removal and installation

applying standard procedures

observing all relevant WHS procedures including the use of PPE and MSDS.

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 light piston engine aircraft pressurisation systems and components. It is essential that relevant procedures, cleanliness requirements and safety precautions are fully observed, understood and complied with. Ability to interpret inspection procedures and specifications (allowable limits) and apply them in practice is critical.

This shall be demonstrated through application across pressurisation systems and components as 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 precautions relevant to light piston engine aircraft pressurisation system maintenance and how to obtain PPE and MSDS

physiological aspects relating to high altitude flight:

human oxygen requirements and hypoxia

human temperature requirements and hypothermia

standard trade practices relating to tool and test equipment usage and installation/securing of system components

sources of pressurised air (cabin supercharger, air pump or engine turbocharger)

the relationship between cabin altitude and pressure differential and related structural limitations

pressurisation system:

layout

operation and characteristics

system component operation and construction:

outflow valves

pressure controllers

safety valves

negative pressure relief valves

dump valves

ducting and outlets

electrical and instrument interfaces, including warning and cabin pressure indication systems

interface with heating and air conditioning systems

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

pressurisation system maintenance requirements and troubleshooting

component attachment methods

connection hardware and couplings

relevant maintenance manuals

relevant regulatory requirements and standard procedures

maintenance requirements and troubleshooting procedures.

---