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SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD: 

Demonstrate knowledge of aircraft power plant maintenance practices 
SAQA US ID UNIT STANDARD TITLE
115241  Demonstrate knowledge of aircraft power plant maintenance practices 
ORIGINATOR
SGB Aircraft Maintenance and Overhaul 
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-  
FIELD SUBFIELD
Field 06 - Manufacturing, Engineering and Technology Manufacturing and Assembly 
ABET BAND UNIT STANDARD TYPE PRE-2009 NQF LEVEL NQF LEVEL CREDITS
Undefined  Regular  Level 3  NQF Level 03 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Reregistered  2018-07-01  2023-06-30  SAQA 06120/18 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2024-06-30   2027-06-30  

In all of the tables in this document, both the pre-2009 NQF Level and the NQF Level is shown. In the text (purpose statements, qualification rules, etc), any references to NQF Levels are to the pre-2009 levels unless specifically stated otherwise.  

This unit standard does not replace any other unit standard and is not replaced by any other unit standard. 

PURPOSE OF THE UNIT STANDARD 
This is a knowledge-based unit standard for people pursuing unit standards in the aircraft power plant maintenance domain.
People credited with this unit standard are able to demonstrate knowledge of the principles of maintaining aircraft power plants and power plant systems to a level that enables them to be trained on the job, and work safely on power plant maintenance activities.
They are able to:
  • Demonstrate knowledge of aircraft propeller maintenance practices
  • Demonstrate knowledge of aircraft gas turbine engine maintenance practices.
  • Demonstrate knowledge of aircraft auxiliary power unit (APU) maintenance practices
  • Demonstrate knowledge of aircraft reciprocating engine maintenance practices
  • Demonstrate knowledge of aircraft gearbox and transmission maintenance practices 

  • LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
    The credit calculation is based on the assumption that learners are already competent in terms of the following outcomes or areas of learning when starting to learn towards this unit standard:
  • Communications and Mathematical literacy at Level 2, or equivalent competence. 

  • UNIT STANDARD RANGE 
    The following scope and context applies to the whole unit standard:
    1. Power plant systems include propellers, gas turbine engines, auxiliary power units, reciprocating engines, gearboxes and transmissions.
    2. Standard practices referred to are those in normal industry use, examples being United Kingdom Civil Aircraft Airworthiness Information and Procedures (publication reference CAP 652), and Federal Airworthiness Administration Acceptable Methods, Techniques and Practices - Aircraft Inspection and Repair (Advisory Circular 43-13-1A).
    Specific range statements are provided in the body of the unit standard where they apply to particular specific outcomes or assessment criteria. 

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Demonstrate knowledge of aircraft propeller maintenance practices. 
    OUTCOME RANGE 
    Propellers include: fixed or variable pitch type. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Propellers are described in terms of types, function, construction, and operating principles. 

    ASSESSMENT CRITERION 2 
    Propeller systems are described in terms of purpose, function and operating principles. 
    ASSESSMENT CRITERION RANGE 
    Systems to be described include: controlling, braking, indicating, de-icing systems.
     

    ASSESSMENT CRITERION 3 
    Propeller system components are described in terms of purpose, function, location and operating principles. 

    ASSESSMENT CRITERION 4 
    Maintenance of propeller assemblies, propeller systems and propeller system components is described in terms of standard industry practices. 
    ASSESSMENT CRITERION RANGE 
    Maintenance practices include: inspection, trouble shooting, removal, installation, balancing, adjustment, testing.
     

    ASSESSMENT CRITERION 5 
    Disassembly and reassembly of propellers for shipping are described in terms of standard industry practices. 

    ASSESSMENT CRITERION 6 
    Maintenance of particular propellers is describes in terms of manufacturer's recommendations. 

    ASSESSMENT CRITERION 7 
    Safety precautions are described in terms of their application to propeller and propeller system maintenance activities. 

    SPECIFIC OUTCOME 2 
    Demonstrate knowledge of aircraft gas turbine engine maintenance practices. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Gas turbine engines are described in terms of their construction, function and operating principles. 

    ASSESSMENT CRITERION 2 
    Gas turbine engine systems are described in terms of purpose, function, and operating principles. 
    ASSESSMENT CRITERION RANGE 
    Systems to be described include: fuel, lubrication, fire protection, ignition, starting, engine controls, engine indicating, power restoration and thrust reverser systems.
     

    ASSESSMENT CRITERION 3 
    Gas turbine engine system components are described in terms of purpose, function and operating principles. 

    ASSESSMENT CRITERION 4 
    Maintenance of gas turbine engine assemblies, engine systems, and engine system components is described in terms of standard industry practices. 
    ASSESSMENT CRITERION RANGE 
    Maintenance practices include: inspection, trouble shooting, component removal and installation, adjustment, and testing.
     

    ASSESSMENT CRITERION 5 
    Maintenance of particular gas turbine engines is described in terms of manufacturer's recommendations. 

    ASSESSMENT CRITERION 6 
    Safety precautions for gas turbine engine maintenance activities are described in terms of standard industry practices. 

    SPECIFIC OUTCOME 3 
    Demonstrate knowledge of aircraft auxiliary power unit (APU) maintenance practices. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Auxiliary power units are described in terms of their purpose, function, construction and operating principles. 

    ASSESSMENT CRITERION 2 
    Auxiliary power unit systems are described in terms of purpose, function, and operating principles. 
    ASSESSMENT CRITERION RANGE 
    Systems to be described include: fuel, lubrication, fire protection, ignition, starting, engine controls, engine indicating systems.
     

    ASSESSMENT CRITERION 3 
    Auxiliary power unit system components are described in terms of purpose, function and operating principles. 

    ASSESSMENT CRITERION 4 
    Maintenance of auxiliary power units and auxiliary power unit systems is described in terms of standard industry practices. 
    ASSESSMENT CRITERION RANGE 
    Maintenance practices include: inspection, trouble shooting, component removal and installation, adjustment, and testing.
     

    ASSESSMENT CRITERION 5 
    Maintenance of particular auxiliary power units is described in terms of manufacturer's recommendations. 

    ASSESSMENT CRITERION 6 
    Safety precautions for auxiliary power unit and auxiliary power unit system maintenance activities are described in terms of standard industry practices. 

    SPECIFIC OUTCOME 4 
    Demonstrate knowledge of aircraft reciprocating engine maintenance practices. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Reciprocating engines are described in terms of their purpose, function, construction and operating principles. 

    ASSESSMENT CRITERION 2 
    Reciprocating engine systems are described in terms of purpose, function, and operating principles. 
    ASSESSMENT CRITERION RANGE 
    Systems to be described include: induction, fuel, exhaust, turbo and supercharging, lubrication, fire protection, ignition, cooling, starting, engine controls, engine indicating systems.
     

    ASSESSMENT CRITERION 3 
    Reciprocating engine system components are described in terms of purpose, function and operating principles. 

    ASSESSMENT CRITERION 4 
    Maintenance of reciprocating engine assemblies, reciprocating engine systems, and reciprocating engine system components is described in terms of standard industry practices. 
    ASSESSMENT CRITERION RANGE 
    Maintenance procedures include: disassembly, inspection, , trouble shooting, component removal and installation, cleaning, repair, replacement, adjustment, and testing.
     

    ASSESSMENT CRITERION 5 
    Safety precautions for reciprocating engine maintenance activities are described in terms of standard industry practices. 

    SPECIFIC OUTCOME 5 
    Demonstrate knowledge of aircraft gearbox and transmission maintenance practices. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Gearboxes and transmissions are described in terms of their purpose, construction and operating principles. 

    ASSESSMENT CRITERION 2 
    Maintenance of gearboxes and transmissions is described in terms of standard industry practices. 
    ASSESSMENT CRITERION RANGE 
    Maintenance procedures include: inspection, trouble shooting, component removal and installation, adjustment, and testing.
     

    ASSESSMENT CRITERION 3 
    Safety precautions for gearbox and transmission maintenance activities are described in terms of standard industry practices. 


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
    1. Anyone assessing a learner against this unit standard must be registered as an assessor with the relevant ETQA.

    2. Any institution offering learning that will enable achievement of this unit standard must be accredited as a provider through the relevant ETQA by SAQA.

    3. Moderation of assessment will be overseen by the relevant ETQA according to the moderation guidelines and the agreed ETQA procedures. 

    UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
    Essential embedded knowledge will be assessed through assessment of the specific outcomes in terms of the stipulated assessment criteria. Candidates are unlikely to achieve all the specific outcomes, to the standards described in the assessment criteria, without knowledge of the listed embedded knowledge. This means that for the most part, the possession or lack of the knowledge can be directly inferred from the quality of the candidate's performance. Where direct assessment of knowledge is required, assessment criteria have been included in the body of the unit standard. 

    UNIT STANDARD DEVELOPMENTAL OUTCOME 
    N/A 

    UNIT STANDARD LINKAGES 
    N/A 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Identify and solve problems and make decisions using critical and creative thinking.
    Note: The ability of the candidate to identify hazardous conditions, assess and take appropriate action. 

    UNIT STANDARD CCFO WORKING 
    Work effectively with others as members of a team, group, organisation or community.
    Note: The ability and willingness of the candidate to accept and interpret work instructions correctly and to request assistance with making safe in an appropriate manner as a team member. 

    UNIT STANDARD CCFO ORGANISING 
    Organise and manage themselves and their activities responsibly and effectively.
    Note: The preparation for making safe, the candidate must indicate what tools and personnel protective equipment is required and communicate to fellow workers his/her intentions. 

    UNIT STANDARD CCFO COLLECTING 
    Collect, analyse, organise and critically evaluate information.
    Note: The ability of the candidate to reconcile the information from the visual examination and constantly evaluate the changing situation. 

    UNIT STANDARD CCFO COMMUNICATING 
    Communicate effectively, using visual, mathematical and / or language skills in the modes of oral and / or written presentations.
    Note: The appropriate communication with the relevant personnel with regard to the reporting of hazards and sub-standard conditions will indicate his/her proficiency in effective communication. 

    UNIT STANDARD CCFO SCIENCE 
    Use science and technology effectively and critically showing responsibility towards the environment and health of others.
    Note: The use of science and technology is not relevant for this unit standard. 

    UNIT STANDARD CCFO DEMONSTRATING 
    Demonstrate an understanding of the world as a set of related systems by recognising that problem-solving contexts do not exist in isolation.
    Note: The ability of the candidate to identify hazard conditions. The effect of non-compliance and deviation from power plant procedures will indicate his/her proficiency in understanding that a specific action or decision taken has more than one effect. 

    UNIT STANDARD ASSESSOR CRITERIA 
    Assessors should keep the following principles in mind when designing and conducting assessments against this unit standard:
  • Focus the assessment activities on gathering evidence in terms of the main outcome expressed in the title to ensure assessment is integrated rather than fragmented. Remember we want to declare the person competent in terms of the title. Where assessment at title level is unmanageable, then focus assessment around each specific outcome, or groups of specific outcomes.
  • Make sure evidence is gathered across the entire range, wherever it applies. Assessment activities should be as close to the real performance as possible, and where simulations or role-plays are used, there should be supporting evidence to show the candidate is able to perform in the real situation.
  • Do not focus the assessment activities on each assessment criterion. Rather make sure the assessment activities focus on outcomes and are sufficient to enable evidence to be gathered around all the assessment criteria.
  • The assessment criteria provide the specifications against which assessment judgements should be made. In most cases, knowledge can be inferred from the quality of the performances, but in other cases, knowledge and understanding will have to be tested through questioning techniques. Where this is required, there will be assessment criteria to specify the standard required.
  • The task of the assessor is to gather sufficient evidence, of the prescribed type and quality, as specified in this unit standard, that the candidate can achieve the outcomes again and again and again. This means assessors will have to judge how many repeat performances are required before they believe the performance is reproducible.
  • All assessments should be conducted in line with the following well documented principles of assessment: appropriateness, fairness, manageability, integration into work or learning, validity, directness, authenticity, sufficiency, systematicity, openness and consistency. 

  • REREGISTRATION HISTORY 
    As per the SAQA Board decision/s at that time, this unit standard was Reregistered in 2012; 2015. 

    UNIT STANDARD NOTES 
    N/A 

    QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Core  48861   National Certificate: Aircraft Maintenance and Overhaul  Level 4  Level TBA: Pre-2009 was L4  Passed the End Date -
    Status was "Reregistered" 
    2016-12-31  TETA 


    PROVIDERS CURRENTLY ACCREDITED TO OFFER THIS UNIT STANDARD: 
    This information shows the current accreditations (i.e. those not past their accreditation end dates), and is the most complete record available to SAQA as of today. Some Primary or Delegated Quality Assurance Functionaries have a lag in their recording systems for provider accreditation, in turn leading to a lag in notifying SAQA of all the providers that they have accredited to offer qualifications and unit standards, as well as any extensions to accreditation end dates. The relevant Primary or Delegated Quality Assurance Functionary should be notified if a record appears to be missing from here.
     
    NONE 



    All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.