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20633 version 1Page 1 of 4

Defuel aircraft

Level 3

Credits 2

Purpose People credited with this unit standard are able to prepare to defuel aircraft,defuel aircraft and complete defuelling related tasks.

Subfield Aeronautical Engineering

Domain Aircraft Mechanical Maintenance

Status Registered

Status date 20 April 2006

Date version published 20 April 2006

Planned review date 31 December 2011

Entry information Open.

Replacement information This unit standard and unit standard 20634 replaced unitstandard 3910.

Accreditation Evaluation of documentation and visit by NZQA andindustry.

Standard setting body (SSB) Aviation, Tourism and Travel Training Organisation Aeronautical Engineering Advisory Group

Accreditation and Moderation Action Plan (AMAP) reference 0028

This AMAP can be accessed at http://www.nzqa.govt.nz/site/framework/search.html.

Special notes

1 All tasks are to be carried out in accordance with enterprise procedures, theenterprise being the organisation carrying out the work. Enterprise proceduresreferred to in this unit standard are the applicable procedures found in the following:

enterprise exposition;manufacturer publications;Government and local body legislation;

airworthiness authority requirements.

New Zealand Qualifications Authority 2013
http://www.nzqa.govt.nz/site/framework/search.htmlhttp://www.nzqa.govt.nz/site/framework/search.html

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2 This unit standard may be assessed against the use of pressurised or gravitysystems.

Elements and performance criteria

Element 1

Prepare to defuel aircraft.

Performance criteria

1.1 Task is determined by reviewing maintenance documentation.

1.2 Environmental conditions in which the task is to be carried out are checked forsuitability in accordance with enterprise procedures.

Range may include but is not limited to precipitation, lightning, airbornedust and/or debris.

1.3 Resources are obtained and checked for serviceability or status in accordancewith enterprise procedures.

Range may include but is not limited to publications, tools, safetyequipment, support equipment, defuelling equipment.

1.4 Quantity or weight of fuel to be unloaded is calculated in accordance withenterprise procedures.

Range may include but is not limited to gallons, litres, pounds,kilograms, specific gravity.

1.5 Aircraft registration and system to be defuelled are matched withdocumentation.

1.6 Aircraft and systems are prepared for the application and removal of power andfor system operation in accordance with enterprise procedures.

Range may include but is not limited to cockpit controls match

component positions, clearances obtained, isolation tagsfitted/removed, warning signs positioned, aircraft levelled, aircraftpositioned, ignition sources eliminated.

1.7 Aircraft and ground equipment are positioned ready for defuelling in accordancewith enterprise procedures.

Range may include but is not limited to pumps, ground power units,stands, fire extinguishers.


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Element 2

Defuel aircraft.


2.1 Fuel, containers and equipment are matched with system to be defuelled inaccordance with enterprise procedures.

2.2 Aircraft is defuelled in accordance with enterprise procedures.

Range may include but is not limited to fuel quality tested to determine ifdisposal is required, bonding attached, defuelling equipmentconnected, defuelling sequence and quantity monitored andcontrolled if applicable.

2.3 Initial action is taken in event of abnormal situations occurring in accordance

with enterprise procedures.

Range may include but is not limited to fire, spillage, personalcontamination by fuel.

Element 3

Complete defuelling related tasks.


3.1 Aircraft, system and work areas are left in a state that enables the next task tobegin in accordance with enterprise procedures.

3.2 Resources are checked for serviceability and returned to service or storage inaccordance with enterprise procedures.

3.3 Non-conformities and abnormal situations are reported and documented inaccordance with enterprise procedures.

3.4 Documentation is completed in accordance with enterprise procedures.

Please note

Providers must be accredited by the Qualifications Authority, or an inter-institutional bodywith delegated authority for quality assurance, before they can report credits fromassessment against unit standards or deliver courses of study leading to that assessment.

Industry Training Organisations must be accredited by the Qualifications Authority beforethey can register credits from assessment against unit standards.

Accredited providers and Industry Training Organisations assessing against unit standards

must engage with the moderation system that applies to those standards.


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Accreditation requirements and an outline of the moderation system that applies to thisstandard are outlined in the Accreditation and Moderation Action Plan (AMAP). TheAMAP also includes useful information about special requirements for organisationswishing to develop education and training programmes, such as minimum qualifications fortutors and assessors, and special resource requirements.

Comments on this unit standard

Please contact the Aviation, Tourism and Travel Training Organisation [email protected] ifyou wish to suggest changes to the content of this unit standard.

mailto:[email protected]:[email protected]

fuel.doc

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