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Elements and Performance Criteria

1. Identify and confirm the modification requirement
   • Job requirements are determined from workplace instructions
   • Reasons for the modification are identified and confirmed with appropriate persons
   • Modification options are identified and presented to appropriate persons according to workplace procedures
   • Hazards associated with the work are identified and risks are managed
   • Legal and safety impacts of the modification are considered, as required, according to regulatory requirements
2. Develop and validate the modification specification
   • Manufacturer benchmark specifications for the existing gas fuel system are sourced and interpreted
   • Criteria for selecting the modification method and evaluating the outcomes are identified and documented
   • Proposed modification method is identified, selected and evaluated from available options
   • Selected option, including material choices and processes, is developed in detail and progressively assessed against established criteria
   • Modification specification is documented according to workplace procedures
3. Apply and test the modification specification
   • Tools, test equipment and materials required to support the modification procedure are identified, selected and prepared for use
   • Selected modification method is carried out according to workplace procedures, and safety and environmental requirements
   • Post-modification testing is carried out according to workplace procedures to confirm modification outcomes are as intended, and any problems detected as having been introduced during the modification process are rectified
   • Test results and other diagnostic findings are verified, as required, by using reliable alternative or optional processes
   • Variations needed during the modification process or as a result of testing are incorporated into the modification specification
   • Information and detail relating to the modification are documented and provided to the appropriate parties according to regulatory and commercial obligations
4. Complete work processes
   • Final inspection is made to ensure work is to workplace expectations
   • Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected
   • Tools and equipment are checked and stored according to workplace procedures
   • Workplace documentation is processed according to workplace procedures
5. Identify and confirm the modification requirement
   • Job requirements are determined from workplace instructions
   • Reasons for the modification are identified and confirmed with appropriate persons
   • Modification options are identified and presented to appropriate persons according to workplace procedures
   • Hazards associated with the work are identified and risks are managed
   • Legal and safety impacts of the modification are considered, as required, according to regulatory requirements
6. Develop and validate the modification specification
   • Manufacturer benchmark specifications for the existing gas fuel system are sourced and interpreted
   • Criteria for selecting the modification method and evaluating the outcomes are identified and documented
   • Proposed modification method is identified, selected and evaluated from available options
   • Selected option, including material choices and processes, is developed in detail and progressively assessed against established criteria
   • Modification specification is documented according to workplace procedures
7. Apply and test the modification specification
   • Tools, test equipment and materials required to support the modification procedure are identified, selected and prepared for use
   • Selected modification method is carried out according to workplace procedures, and safety and environmental requirements
   • Post-modification testing is carried out according to workplace procedures to confirm modification outcomes are as intended, and any problems detected as having been introduced during the modification process are rectified
   • Test results and other diagnostic findings are verified, as required, by using reliable alternative or optional processes
   • Variations needed during the modification process or as a result of testing are incorporated into the modification specification
   • Information and detail relating to the modification are documented and provided to the appropriate parties according to regulatory and commercial obligations
8. Complete work processes
   • Final inspection is made to ensure work is to workplace expectations
   • Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected
   • Tools and equipment are checked and stored according to workplace procedures
   • Workplace documentation is processed according to workplace procedures

Range Statement

This section specifies 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. Bold italicised wording, if used in the performance criteria, is detailed below.

Safety and environmental requirements must include:

work health and safety (WHS) and occupational health and safety (OHS) requirements, including procedures for working with extremely cold and flammable gas environmental requirements, including procedures for preventing loss of gas to atmosphere.

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Performance Evidence

Before competency can be determined, individuals must demonstrate they can perform the following according to the standards defined in this unit’s elements, performance criteria, range of conditions and foundation skills:

develop and apply the following significant and non-routine modifications on the gas fuel systems of two different vehicles or machinery:

adapt or modify gas fuel system to a significantly changed capability

adapt gas fuel system for different work conditions

modify or install a significant gas fuel system for a special purpose.

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Knowledge Evidence

Individuals must be able to demonstrate knowledge of:

work health and safety (WHS) and occupational health and safety (OHS) requirements relating to developing and applying gas fuel system modifications, including procedures for working with extremely cold and flammable gas

environmental requirements, including procedures for preventing loss of gas to atmosphere

principles and processes involved in planning and implementing modifications to gas fuel systems

types, functions, operation and limitations of gas fuel systems being modified, including:

liquefied petroleum gas (LPG)

compressed natural gas (CNG)

liquefied natural gas (LNG)

types, functions, operation and limitations of diagnostic testing equipment required for gas fuel system modifications

associated vehicle systems and their impact on gas fuel system operation

requirements of Australian Design Rules (ADRs) and Vehicle Safety Bulletins (VSBs) relating to gas fuel system modifications

procedures for documenting and reporting the modification specifications and outcomes.

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