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 pressurisation control systems and components
  2. Test/adjust pressurisation control systems and components
  3. Troubleshoot pressurisation control 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.

Pressurisation control systems include:

Cabin altimeters

Differential pressure indicators

Cabin rate of climb indicators

Pressure controllers (manual and automatic)

Safety switches

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 relevant WHS practices

using approved maintenance documentation and aircraft publications relating to the pressurisation control system being maintained

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

cabin altimeters, differential pressure indicators and cabin rate of climb indicators

pressure controllers (manual and automatic)

safety switches

applying logic processes, taking and interpreting system measurements, and using test equipment and appropriate wiring diagrams and manuals to accurately and effectively isolate malfunctions in the listed system components

assisting with the performance of pressurisation system testing to isolate system malfunctions and assess post-maintenance serviceability.

It is essential that system testing procedures, cleanliness requirements and safety precautions applicable to the pressurisation control 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 pressurisation control system and its components.


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:

component attachment methods

the basic layout (block diagram level), function and operation of the listed components and their operation and function within the aircraft pressurisation system, including applicable interface with the outflow and safety valves:

cabin altimeters

differential pressure indicators

cabin rate of climb indicators

pressure controllers (manual and automatic)

safety switches

basic principles/functions, relating to the listed system components and associated with:

basic alternating current (AC) and direct current (DC) circuit theory

digital fundamentals

analogue fundamentals

atmospheric conditions, properties and effect on humans

pressurisation terminology

pressurisation control system maintenance requirements and troubleshooting procedures

relevant WHS practices

relevant maintenance manuals

relevant regulatory requirements and standard procedures.