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Elements and Performance Criteria

1. Prepare for shot peening task
   • Process documentation is obtained and correctly interpreted
   • Shot peening equipment is prepared in accordance with the applicable process
2. Apply shot peening process to Almen strip
   • The correct Almen strip is selected and fitted and equipment set up with the correct stand-off distance and regulated air pressure or spindle speed in accordance with the process documentation
   • Applicable work health and safety (WHS) provisions are observed, including the use of material safety data sheets (MSDS) and personal protective equipment (PPE)
   • The process is correctly applied to the Almen strip
   • The Almen strip distortion is measured to ensure that it is within the specified tolerance
   • Equipment settings are adjusted and the Almen strip test repeated, if required
   • Settings that produce specified Almen strip distortion are recorded and the test strip is presented for inspection
3. Apply shot peening process to component
   • The component is cleaned and masked in accordance with process documentation
   • Shot peening is applied in accordance with the process documentation using equipment settings derived from Almen test strip and while observing all WHS requirements, including use of MSDS and PPE
   • The shot peened surface is checked for required density and coverage and re-peened, if necessary
   • The shot peened component is checked for cleanliness to ensure that all contaminants have been removed in accordance with the process documentation
4. Complete shot peening task
   • Task completion is recorded in accordance with standard enterprise procedures
   • Shot peened component is presented for inspection, along with Almen test strip and completed documentation
   • Where applicable, the component is tagged, sealed or packaged in accordance with specified 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.
Shot peening equipment includes:	Air pressure or rotor propulsion of shot and either fixed or portable shot peen units
Stand-off distance applies to:	nozzle distance from surface for air pressure shot peening processes, or spindle distance from job for rotor shot peening
Regulated air pressure or spindle speed:	The specified air pressure applied to the shot nozzle or the specified revolutions per minute (r.p.m.) of the spindle in the rotor peening process
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:

applying relevant WHS procedures, including the use of MSDS and applicable items of PPE

using relevant process documentation relating to shot peening of component surfaces to:

select and set up the required shot peening equipment

select and set up the Almen test strip

adjust equipment settings to obtain the required Almen strip distortion

prepare component surfaces for shot peening

shot peen surfaces to obtain the specified intensity and coverage

remove surface contaminants from shot peened surfaces

correctly disposing of waste shot peening media.

The underlying skills inherent in this unit should be transferable across a range of shot peening applications associated with aircraft components. It is essential that the relevant procedures are interpreted and applied to ensure quality and safety standards are achieved.

Evidence of transferability of skills and knowledge related to shot peening is essential. This shall be demonstrated through application across a number of different aircraft components.

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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:

how to obtain relevant MSDS

the correct use of PPE

WHS procedures

the reasons for shot peening

the types of aircraft component and the materials that are shot peened

shot peening equipment and processes applicable to aircraft components

the uses of different types of shot peening media

the use of process documentation

the types of Almen test strips and their uses

setting up and calibrating equipment for use

preparation of surfaces for peening and cleaning after peening

environmental requirements associated with disposal of used media.

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