Unit of competency details

DEFEO511D - Maintain grenades (Release 2)


ReleaseStatusRelease date
2 (this release)Current 24/Jan/2013
(View details for release 1) Replaced15/Mar/2012

Usage recommendation:
Is superseded by and equivalent to DEFEXO041 - Maintain grenadesUnit code updated. Content and formatting updated to comply with the new standards. All PC transitioned from passive to active voice. PC 1.2 removed, PC 3.1 reworded. 21/Oct/2015

Training packages that include this unit


SchemeCodeClassification value
ASCED Module/Unit of Competency Field of Education Identifier 030715 Precision Metalworking  

Classification history

SchemeCodeClassification valueStart dateEnd date
ASCED Module/Unit of Competency Field of Education Identifier 030715 Precision Metalworking  03/Sep/2012 
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Modification History


TP version 



DEF12 V2

Layout adjusted.


DEF12 V1

First release.

Unit Descriptor

This unit covers the competency required to maintain grenades to requirements as specified by the Australian Defence Force.

Application of the Unit

This competency normally applies to the individual who is required to maintain grenades to requirements as specified by the Australian Defence Force.

The unit includes the identification and selection of tools and equipment, the application of organisational safety requirements and appropriate legislative and regulatory requirements.

Licensing/Regulatory Information

Not applicable.


Not applicable.

Employability Skills Information

This unit contains employability skills.

Elements and Performance Criteria Pre-Content

Elements describe the essential outcomes of a Unit of Competency.

Performance Criteria describe the required performance needed to demonstrate achievement of the element. Where bold italicised  text is used, further information is detailed in the Range Statement. Assessment of performance is to be consistent with the Evidence Guide.

Elements and Performance Criteria



1. Prepare for maintenance 

1.1 Maintenance requirements of grenades  are identified from work requests/instructions, analysed and confirmed

1.2 Work health and safety (WHS) requirements, including those contained in organisational  procedures, are applied throughout the operation

1.3 Grenades to be maintained are identified, confirmed and acquired in accordance with organisation policy and procedures, and technical documentation

1.4 Technical references , tools, equipment, consumables and packaging components are identified, acquired and prepared in accordance with organisation procedures

1.5 Net explosive quantities  and compatibility  are identified, calculated and assessed and applied throughout the operation

1.6 Environmental conditions  are monitored and, where appropriate, maintained in accordance with organisation policy

2. Maintain grenades 

2.1 Grenades are inspected in accordance with organisation policy and procedures

2.2 Relevant maintenance  is conducted in accordance with organisation procedures, technical specifications and drawings

2.3 Emergency and contingency procedures are applied in accordance with organisation policy

2.4 Relevant tests  are conducted and recorded in accordance with organisation procedures, technical specifications and drawings

3. Complete the maintenance activity 

3.1 Grenades are processed  in accordance with the requirements specified in the work request

3.2 Equipment/tools are maintained in accordance with organisation policy and procedures

3.3 Housekeeping procedures are conducted in accordance with workshop requirements

3.4 Documentation and records  are maintained in accordance with statutory, organisation and workshop requirements

Required Skills and Knowledge

This describes the essential skills and knowledge and their level, required for this unit.

Required Skills 

  • apply compatibility constraints
  • apply environmental constraints
  • apply operational safety
  • apply relevant WHS requirements
  • calculate net explosive quantity
  • communicate orally and in writing
  • conduct tests
  • identify and select appropriate tools and equipment
  • identify appropriate grenades
  • maintain documentation
  • use tools and equipment

Required Knowledge 

  • assessment of compatibility
  • colour coding, marking and labels
  • documentation requirements
  • effects of environmental conditions
  • maintenance procedures
  • net explosive quantity calculations
  • operational safety
  • operations, characteristics and limitations of grenades to be maintained
  • operations, characteristics and limitations of tools and equipment used in maintenance
  • relevant WHS requirements
  • testing procedures

Evidence Guide

Critical aspects for assessment and evidence required to demonstrate competency in this unit 

Assessment must confirm the ability to comply with:

  • organisational safety requirements
  • appropriate legislative and regulatory requirements while maintaining grenades.

Assessment must also confirm the ability to work safely within an explosive ordnance environment and to:

  • calculate and apply net explosive quantity
  • assess and apply compatibility
  • conduct relevant tests
  • maintain documentation

Consistency in performance 

Competency should be demonstrated in a range of actual or simulated grenades maintenance contexts.

Context of and specific resources for assessment 

Context of assessment 

Competency should be assessed in the workplace or in a simulated work environment, in accordance with all relevant legislation and organisation requirements.

Specific resources for assessment 

Access is required to:

  • facilities and resources used in the storage, distribution or maintenance of explosive ordnance, including a licensed explosive site

Method of assessment 

This unit may be assessed with the following unit:

  • DEFEO101D Work safely with explosive ordnance.

In a public safety environment assessment is usually conducted via direct observation in a training environment or in the workplace via subject matter supervision and/or mentoring, which is typically recorded in a competency workbook.

Assessment is completed using appropriately qualified assessors who select the most appropriate method of assessment.

Assessment may occur in an operational environment or in an industry-approved simulated work environment. Forms of assessment that are typically used include:

  • direct observation
  • interviewing the candidate
  • journals and workplace documentation
  • third party reports from supervisors
  • written or oral questions

Range Statement

The Range Statement relates to the Unit of Competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised  wording in the Performance Criteria is detailed below.

Grenades  include:

  • All items currently on the Australian Defence Force in-service grenades inventory

Organisation  may include:

  • Defence organisation
  • Enterprises that work with explosive ordnance
  • Other government departments or instrumentalities that work with explosive ordnance

Technical references  may include:

  • Orders and instructions
  • Other publications
  • Technical drawings
  • Technical reference pamphlets

Net explosive quantities  include:

  • The explosive capacity calculated in a wide range of activities related to the storage, distribution and maintenance of explosive ordnance

Compatibility  is:

  • Assessed in a wide range of activities related to the storage, distribution and maintenance of explosive ordnance and other hazardous materials

Environmental conditions  may include:

  • Air quality
  • Heat
  • Humidity
  • Pressure

Relevant maintenance  may include:

  • Cleaning
  • Components change out
  • Fuzing and defuzing
  • Painting

Tests  may include:

  • Continuity tests
  • Gauging
  • Measuring

Processing  may include:

  • Forwarding grenades for inspection, testing, maintenance, storage or issue, and may include some additional preparation such as packaging

Documentation and records  may include:

  • Receipt and issue records
  • Timesheets
  • Work records

Unit Sector(s)

Not applicable.

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