Unit of Competency Mapping – Information for Teachers/Assessors – Information for Learners

MEA356 Mapping and Delivery Guide
Maintain light piston engine aircraft pressurisation systems

Version 1.0
Issue Date: June 2024


Qualification -
Unit of Competency MEA356 - Maintain light piston engine aircraft pressurisation systems
Description
Employability Skills
Learning Outcomes and Application This unit of competency requires application of hand skills and the use of system/component knowledge and applicable maintenance publications and test equipment to inspect, test, troubleshoot and replace components of light piston engine aircraft pressurisation systems during the performance of scheduled or unscheduled maintenance. Maintenance may be performed individually or as part of a team.Applications include all types of light fixed wing piston engine aircraft that have cabin pressurisation systems. Where aircraft types have pressurisation and air cycle air conditioning systems the applicable units are MEA208 Remove and install aircraft pressurisation control system components, MEA219 Inspect, test and troubleshoot aircraft pressurisation control systems and components, MEA303 Remove and install aircraft pneumatic system components and MEA310 Inspect, test and troubleshoot aircraft pneumatic systems and components.The unit is part of the Mechanical Certificate IV (Aircraft Maintenance Stream) training pathway. Where a Civil Aviation Safety Authority (CASA) licensing outcome is sought this unit forms part of the CASA requirement for the granting of the chosen maintenance certification licence under Civil Aviation Safety Regulation (CASR) Part 66, in accordance with the licensing provisions in the Companion Volume Implementation Guide.
Duration and Setting X weeks, nominally xx hours, delivered in a classroom/online/blended learning setting.

Competency should be assessed in the work environment or simulated work environment using tools and equipment specified in maintenance documentation. It is also expected that applicable general-purpose tools and test equipment found in most routine situations would be used where appropriate.

The application of testing procedures should clearly indicate knowledge of system operation, the relationship of individual components and the links with other systems (if applicable) within the limits of the aircraft/system fault-finding guide before undertaking any action. The work plan should take account of applicable safety and quality requirements in accordance with the industry and regulatory standards.

The following conditions of assessment represent the requirements of the Regulators (ADF and CASA) and maintenance stakeholders and must be rigorously observed.

A person cannot be assessed as competent until it can be demonstrated to the satisfaction of the workplace assessor that the relevant elements and performance criteria of this unit of competency are being achieved under routine supervision on a pressurisation system and on a representative range of the following components:

pressure controllers

outflow valves

safety valves

negative pressure relief valves

ducting.

This shall be established via the records in the Log of Industrial Experience and Achievement or, where appropriate, an equivalent Industry Evidence Guide (for details refer to the Companion Volume Assessment Guidelines).

Assessors must satisfy the requirements of the National Vocational Education and Training Regulator (Australian Skills Quality Authority, or its successors).

Where the unit is to be used for CASA licensing purposes the Assessor must also meet the criteria specified in the CASR Part 147 Manual of Standards.
Prerequisites/co-requisites
Competency Field Aviation maintenance
Development and validation strategy and guide for assessors and learners Student Learning Resources Handouts
Activities 		Slides
PPT 		Assessment 1 Assessment 2 Assessment 3 Assessment 4
Elements of Competency Performance Criteria              
Element: Inspect light piston engine aircraft pressurisation system
  • Relevant maintenance documentation and modification status, including system defect reports, where relevant, are used to identify specific inspection requirements
  • Isolation tags are checked and aircraft configured for safe system inspection and operation in accordance with the applicable maintenance manual
  • Pressurisation system components are visually or physically checked for external signs of defects in accordance with applicable maintenance manual while observing all relevant work health and safety (WHS) requirements, including the use of material safety data sheets (MSDS) and items of personal protective equipment (PPE)
  • Defects are correctly identified and reported
       
Element: Test/adjust light piston engine aircraft pressurisation systems and components
  • Aircraft and system are prepared in accordance with applicable maintenance manual for the application of power/system operation
  • Pressurisation system is functionally tested in accordance with maintenance manual for evidence of serviceability or malfunction
  • System adjustment is performed in accordance with maintenance manual
       
Element: Troubleshoot light piston engine aircraft pressurisation systems
  • Available information from maintenance documentation, inspection and test results is used, where necessary, to assist in fault determination
  • Maintenance manual fault diagnosis guides and logic processes are used to ensure efficient and accurate troubleshooting to line replacement level
  • Specialist advice is obtained, where required, to assist with the troubleshooting process
  • Pressurisation system faults are located and the causes of the faults are clearly identified and correctly recorded in maintenance documentation, where required, in accordance with standard enterprise procedures
  • Rectification requirements are determined
       
Element: Remove and install light piston engine aircraft pressurisation system components
  • System is rendered safe in accordance with the applicable maintenance manual and isolation tags are fitted, where necessary, to ensure personnel safety
  • Pressurisation system component removal is carried out in accordance with the applicable maintenance manual while observing all relevant WHS requirements, including the use of MSDS and items of PPE
  • Required maintenance documentation is accurately completed and correctly processed
  • Removed components are tagged, sealed and packaged in accordance with specified procedures
  • Components to be installed are checked to confirm correct part numbers, serviceability and modification status
  • Installation is carried out in accordance with the applicable maintenance manual
  • Required maintenance documentation is completed and processed in accordance with standard enterprise procedures
       


Evidence Required

List the assessment methods to be used and the context and resources required for assessment. Copy and paste the relevant sections from the evidence guide below and then re-write these in plain English.

Elements describe the essential outcomes.

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

1.

Inspect light piston engine aircraft pressurisation system

1.1

Relevant maintenance documentation and modification status, including system defect reports, where relevant, are used to identify specific inspection requirements

1.2

Isolation tags are checked and aircraft configured for safe system inspection and operation in accordance with the applicable maintenance manual

1.3

Pressurisation system components are visually or physically checked for external signs of defects in accordance with applicable maintenance manual while observing all relevant work health and safety (WHS) requirements, including the use of material safety data sheets (MSDS) and items of personal protective equipment (PPE)

1.4

Defects are correctly identified and reported

2.

Test/adjust light piston engine aircraft pressurisation systems and components

2.1

Aircraft and system are prepared in accordance with applicable maintenance manual for the application of power/system operation

2.2

Pressurisation system is functionally tested in accordance with maintenance manual for evidence of serviceability or malfunction

2.3

System adjustment is performed in accordance with maintenance manual

3.

Troubleshoot light piston engine aircraft pressurisation systems

3.1

Available information from maintenance documentation, inspection and test results is used, where necessary, to assist in fault determination

3.2

Maintenance manual fault diagnosis guides and logic processes are used to ensure efficient and accurate troubleshooting to line replacement level

3.3

Specialist advice is obtained, where required, to assist with the troubleshooting process

3.4

Pressurisation system faults are located and the causes of the faults are clearly identified and correctly recorded in maintenance documentation, where required, in accordance with standard enterprise procedures

3.5

Rectification requirements are determined

4.

Remove and install light piston engine aircraft pressurisation system components

4.1

System is rendered safe in accordance with the applicable maintenance manual and isolation tags are fitted, where necessary, to ensure personnel safety

4.2

Pressurisation system component removal is carried out in accordance with the applicable maintenance manual while observing all relevant WHS requirements, including the use of MSDS and items of PPE

4.3

Required maintenance documentation is accurately completed and correctly processed

4.4

Removed components are tagged, sealed and packaged in accordance with specified procedures

4.5

Components to be installed are checked to confirm correct part numbers, serviceability and modification status

4.6

Installation is carried out in accordance with the applicable maintenance manual

4.7

Required maintenance documentation is completed and processed in accordance with standard enterprise procedures

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:

using hand skills, tools and test equipment in the testing, adjustment and troubleshooting of light piston engine aircraft pressurisation systems and components, including system component removal and installation

recognising pressurisation system and component defects/external damage, correct installation and security for the types of system components listed in the Range of Conditions

performing system functional tests and checks to isolate system faults and assess post-maintenance serviceability

effectively using maintenance documentation and relevant fault diagnosis guides in the troubleshooting process and for component removal and installation

applying standard procedures

observing all relevant WHS procedures including the use of PPE and MSDS.

The underlying skills inherent in this unit should be transferable across a range of inspection, testing and troubleshooting applications (including the timely involvement of supervisors or other trades) associated with light piston engine aircraft pressurisation systems and components. It is essential that relevant procedures, cleanliness requirements and safety precautions are fully observed, understood and complied with. Ability to interpret inspection procedures and specifications (allowable limits) and apply them in practice is critical.

This shall be demonstrated through application across pressurisation systems and components as listed in the Assessment Conditions.

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:

WHS precautions relevant to light piston engine aircraft pressurisation system maintenance and how to obtain PPE and MSDS

physiological aspects relating to high altitude flight:

human oxygen requirements and hypoxia

human temperature requirements and hypothermia

standard trade practices relating to tool and test equipment usage and installation/securing of system components

sources of pressurised air (cabin supercharger, air pump or engine turbocharger)

the relationship between cabin altitude and pressure differential and related structural limitations

pressurisation system:

layout

operation and characteristics

system component operation and construction:

outflow valves

pressure controllers

safety valves

negative pressure relief valves

dump valves

ducting and outlets

electrical and instrument interfaces, including warning and cabin pressure indication systems

interface with heating and air conditioning systems

how to configure the aircraft for inspection, testing and troubleshooting of pressurisation systems and components

pressurisation system maintenance requirements and troubleshooting

component attachment methods

connection hardware and couplings

relevant maintenance manuals

relevant regulatory requirements and standard procedures

maintenance requirements and troubleshooting procedures.

Submission Requirements

List each assessment task's title, type (eg project, observation/demonstration, essay, assignment, checklist) and due date here

Assessment task 1: [title]      Due date:

(add new lines for each of the assessment tasks)

Assessment Tasks

Copy and paste from the following data to produce each assessment task. Write these in plain English and spell out how, when and where the task is to be carried out, under what conditions, and what resources are needed. Include guidelines about how well the candidate has to perform a task for it to be judged satisfactory.

Elements describe the essential outcomes.

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

1.

Inspect light piston engine aircraft pressurisation system

1.1

Relevant maintenance documentation and modification status, including system defect reports, where relevant, are used to identify specific inspection requirements

1.2

Isolation tags are checked and aircraft configured for safe system inspection and operation in accordance with the applicable maintenance manual

1.3

Pressurisation system components are visually or physically checked for external signs of defects in accordance with applicable maintenance manual while observing all relevant work health and safety (WHS) requirements, including the use of material safety data sheets (MSDS) and items of personal protective equipment (PPE)

1.4

Defects are correctly identified and reported

2.

Test/adjust light piston engine aircraft pressurisation systems and components

2.1

Aircraft and system are prepared in accordance with applicable maintenance manual for the application of power/system operation

2.2

Pressurisation system is functionally tested in accordance with maintenance manual for evidence of serviceability or malfunction

2.3

System adjustment is performed in accordance with maintenance manual

3.

Troubleshoot light piston engine aircraft pressurisation systems

3.1

Available information from maintenance documentation, inspection and test results is used, where necessary, to assist in fault determination

3.2

Maintenance manual fault diagnosis guides and logic processes are used to ensure efficient and accurate troubleshooting to line replacement level

3.3

Specialist advice is obtained, where required, to assist with the troubleshooting process

3.4

Pressurisation system faults are located and the causes of the faults are clearly identified and correctly recorded in maintenance documentation, where required, in accordance with standard enterprise procedures

3.5

Rectification requirements are determined

4.

Remove and install light piston engine aircraft pressurisation system components

4.1

System is rendered safe in accordance with the applicable maintenance manual and isolation tags are fitted, where necessary, to ensure personnel safety

4.2

Pressurisation system component removal is carried out in accordance with the applicable maintenance manual while observing all relevant WHS requirements, including the use of MSDS and items of PPE

4.3

Required maintenance documentation is accurately completed and correctly processed

4.4

Removed components are tagged, sealed and packaged in accordance with specified procedures

4.5

Components to be installed are checked to confirm correct part numbers, serviceability and modification status

4.6

Installation is carried out in accordance with the applicable maintenance manual

4.7

Required maintenance documentation is completed and processed in accordance with standard enterprise procedures

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.

Pressurisation system components include:

Pressure controllers

Outflow valves

Safety valves

Negative pressure relief valves

Ducting

Procedures and requirements include:

Industry standard procedures specified by manufacturers, regulatory authorities or the enterprise

Copy and paste from the following performance criteria to create an observation checklist for each task. When you have finished writing your assessment tool every one of these must have been addressed, preferably several times in a variety of contexts. To ensure this occurs download the assessment matrix for the unit; enter each assessment task as a column header and place check marks against each performance criteria that task addresses.

Observation Checklist

Tasks to be observed according to workplace/college/TAFE policy and procedures, relevant legislation and Codes of Practice Yes No Comments/feedback
Relevant maintenance documentation and modification status, including system defect reports, where relevant, are used to identify specific inspection requirements 
Isolation tags are checked and aircraft configured for safe system inspection and operation in accordance with the applicable maintenance manual 
Pressurisation system components are visually or physically checked for external signs of defects in accordance with applicable maintenance manual while observing all relevant work health and safety (WHS) requirements, including the use of material safety data sheets (MSDS) and items of personal protective equipment (PPE) 
Defects are correctly identified and reported 
Aircraft and system are prepared in accordance with applicable maintenance manual for the application of power/system operation 
Pressurisation system is functionally tested in accordance with maintenance manual for evidence of serviceability or malfunction 
System adjustment is performed in accordance with maintenance manual 
Available information from maintenance documentation, inspection and test results is used, where necessary, to assist in fault determination 
Maintenance manual fault diagnosis guides and logic processes are used to ensure efficient and accurate troubleshooting to line replacement level 
Specialist advice is obtained, where required, to assist with the troubleshooting process 
Pressurisation system faults are located and the causes of the faults are clearly identified and correctly recorded in maintenance documentation, where required, in accordance with standard enterprise procedures 
Rectification requirements are determined 
System is rendered safe in accordance with the applicable maintenance manual and isolation tags are fitted, where necessary, to ensure personnel safety 
Pressurisation system component removal is carried out in accordance with the applicable maintenance manual while observing all relevant WHS requirements, including the use of MSDS and items of PPE 
Required maintenance documentation is accurately completed and correctly processed 
Removed components are tagged, sealed and packaged in accordance with specified procedures 
Components to be installed are checked to confirm correct part numbers, serviceability and modification status 
Installation is carried out in accordance with the applicable maintenance manual 
Required maintenance documentation is completed and processed in accordance with standard enterprise procedures 

Forms

Assessment Cover Sheet

MEA356 - Maintain light piston engine aircraft pressurisation systems
Assessment task 1: [title]

Student name:

Student ID:

I declare that the assessment tasks submitted for this unit are my own work.

Student signature:

Result: Competent Not yet competent

Feedback to student

 

 

 

 

 

 

 

 

Assessor name:

Signature:

Date:

Assessment Record Sheet

MEA356 - Maintain light piston engine aircraft pressurisation systems

Student name:

Student ID:

Assessment task 1: [title] Result: Competent Not yet competent

(add lines for each task)

Feedback to student:

 

 

 

 

 

 

 

 

Overall assessment result: Competent Not yet competent

Assessor name:

Signature:

Date:

Student signature:

Date: