This unit involves the skills and knowledge required to isolate, disconnect, repair, reconnect and maintain stationary gas fuelled turbine engines up to a capacity of 5 gigajoule per hour (GJ/hr) (1,300 kilowatt).

It includes disconnecting, carrying out repairs and replacing fuel train components to stationary gas fuelled turbine engine. Reconnecting the gas fuelled turbine engine includes pre-start tests, start up, adjusting components and controls to safe and efficient operation, and completing all required documentation.

This unit does not cover:

repairs to the internal mechanical components of the engine

modifications to gas fuelled turbine engine.

Note: 500 kw equates to a gas input of approximately 6 GJ/hr.

The application of the skills and knowledge described in this unit may require a license or permit to practice in the workplace.

Other conditions may apply under state and territory legislative and regulatory licencing requirements which must be confirmed prior to commencing this unit.

No licensing, legislative or certification requirements apply to this unit at the time of publication.

ELEMENTS

PERFORMANCE CRITERIA

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1

Prepare to repair and maintain gas fuelled turbine engine

1.1

Work health and safety (WHS)/occupational health and safety (OHS) workplace procedures for a given work area are identified, obtained and applied

1.2

Hazards are identified, risks are assessed and existing risk control measures and workplace procedures are implemented in preparation for work

1.3

Safety hazards that have not previously been identified are noted on job safety assessments and existing risk control measures are implemented

1.4

Formal authority to proceed with repair and maintenance is obtained before commencing work in accordance with regulatory and code of practice requirements

1.5

Repair and maintenance plans are prepared in consultation with person/s affected by work activity and sequenced appropriately

1.6

Scope, nature and location of work activity is determined from documentation or relevant person/s

1.7

Gas fuelled turbine engine plant, equipment and component specifications and manufacturer manuals are obtained for planned work activity

1.8

Material needed for the gas fuelled turbine engine repair and maintenance work is obtained in accordance with workplace procedures and checked against job requirements

1.9

Tools, equipment, personal protective equipment (PPE) and testing devices needed to for the repair and maintenance work are obtained in accordance with workplace procedures and checked for correct operation and safety

1.10

Preparatory work is checked to ensure no damage has occurred and complies with job requirements

2

Repair and maintain gas fuelled turbine engine

2.1

WHS/OHS risk control measures and workplace procedures for carrying out work activities are followed

2.2

Relevant gas regulatory and codes of practice, and recording and reporting requirements are satisfied at appropriate times throughout the work sequence

2.3

Gas and electrical circuits/machines/plant are isolated and safe in accordance with authority, WHS/OHS requirements and workplace procedures before work is commenced

2.4

Nature and possible cause of faults or out-of-specification performance are identified from defect reports or operational records

2.5

Fault-finding gas fuelled turbine engine is approached methodically using observation, measurement, calculations and comparison with normal system and component parameters/values

2.6

Faults beyond the scope of gas fuel train, ignition or fume exhaust work are identified and arrangements are made for appropriately competent and authorised person to rectify fault/s

2.7

Engine is disconnected to carry out maintenance and repairs, as required, in accordance with gas authority and WHS/OHS requirements and workplace procedures

2.8

Components are removed/dismantled and parts stored to protect them against loss or damage, as required

2.9

Faulty components are rechecked and their fault status confirmed

2.10

Gas fuelled turbine engine materials required to rectify faults are sourced and obtained in accordance with workplace procedures

2.11

Repair and maintenance work is carried out efficiently, without unnecessary waste of materials or damage to apparatus, circuits, and the surrounding environment or services using sustainable energy principles

2.12

Effectiveness of the repair is inspected and tested in accordance with workplace procedures

2.13

System is reassembled, reconnected and finally inspected and tested to ensure it is operating safely, effectively and complies with relevant industry standards and job requirements

2.14

Unplanned situations are responded to in accordance with workplace procedures, in a manner that minimises risk to personnel and equipment safely and with the approval of an authorised person

3

Complete and report repair and maintenance

3.1

WHS/OHS work completion risk control measures and workplace procedures are followed

3.2

Check of the gas fuelled turbine engine is made to verify compliance with job requirements, certification required by relevant gas authorities and industry standards

3.3

Work area is cleared and materials disposed of or recycled in accordance with relevant legislation and workplace procedures

3.4

Tools and equipment are cleaned, checked, serviced and stored in accordance with manufacturer recommendations and workplace procedures

3.5

Work site is cleaned and made safe in accordance with workplace procedures

3.6

Maintenance and repair work is documented and appropriate person/s notified in accordance with workplace procedures

Foundation skills essential to performance are explicit in the performance criteria of this unit of competency.

Range is restricted to essential operating conditions and any other variables essential to the work environment.

Non-essential conditions may be found in the UEG Gas Industry Companion Volume Implementation Guide.

repairing and maintaining stationary gas fuelled turbine engine up to a capacity of 5 GJ/hr (1300kw), must include each of the following:

gas fuel train pipe-work, regulators, valves, metering and protective devices from gas pipeline to the engine.

flue/exhaust system

pressure testing and purging gas fuel train

disconnecting and reconnecting gas fuelled turbine engines, and adjusting components and controls to safe and efficient operation

repairing and maintaining of stationary gas fuelled turbine engine must not include the following:

repairs to the internal mechanical components of the engine

modifications to gas fuelled turbine engine

gas fuels must include one (1) of the following:

natural gas

liquified petroleum gas (LPG)

synthetic natural gas (SNG)

bio-gas

waste gas or sewage gas

used as a single gas fuel or part of a dual fuel system

Gas Industry

Cross Discipline Units