Assessor Resource

MEA361A
Maintain aircraft two stroke petrol engines

Assessment tool

Version 1.0
Issue Date: May 2024


This unit requires application of hand skills, the use of maintenance publications and knowledge of two stroke petrol engine and system theory to inspect, test and troubleshoot, remove and install aircraft two stroke petrol engines and engine system components.

Applications include aircraft two stroke petrol engines driving fixed pitch propellers. Where the engine is driving a constant speed propeller, MEA307C Remove and install propeller systems and components and MEA315C Inspect, test and troubleshoot propeller systems and components, will also be required.

This unit of competency is part of the Mechanical Certificate IV (Aircraft Maintenance Stream) training pathway. It covers the competencies required to maintain installed aircraft two stroke petrol engines.

Where a CASA licensing outcome is sought this unit forms part of the CASA requirement for the granting of the chosen Aircraft Maintenance Engineer Licence under CASR Part 66, in accordance with the licensing provisions in Section 3, Assessment Guidelines.

You may want to include more information here about the target group and the purpose of the assessments (eg formative, summative, recognition)

Prerequisites

Not applicable

Co-Requisites

MEA353A

Maintain basic light aircraft engines and propellers

Employability Skills

This unit contains employability skills.



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.

The Evidence Guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package.

Overview of assessment

A person who demonstrates competency in this unit must be able to apply hand skills, use maintenance publications and engine and system theory knowledge to inspect, test, troubleshoot, remove and install aircraft two stroke petrol engines and engine system components while applying all relevant safety precautions.

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

The underlying skills inherent in this unit should be transferable across a range of inspection, testing, troubleshooting and removal and installation tasks (including the timely involvement of supervisor or other trades) associated with two stroke petrol aircraft engines and engine. It is essential that system testing procedures take into account all safety precautions associated with two stroke petrol engine system operation and that awareness be demonstrated of dual inspection requirements associated with work on engine controls.

Evidence of transferability of skills and knowledge related to inspection, testing and troubleshooting is essential. This may be demonstrated through application across a number of engine systems or types. Ability to interpret inspection procedures and specifications (allowable limits) and apply them in practice is critical. The application of testing procedures and functional checks should also indicate knowledge of system operation. Engine system operation knowledge, the relationship of individual components and the links with other systems will be necessary to supplement evidence of ability to carry out engine control system checks and troubleshoot the system 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.

A person cannot be assessed as competent until it can be demonstrated to the satisfaction of the workplace assessor that the relevant elements of the unit of competency are being achieved under routine supervision on at least one item from each of Groups 1 to 7 listed in the Range Statement. This shall be established via the records in the Log of Industrial Experience and Achievement or, where appropriate, an equivalent Industry Evidence Guide.

Context of and specific resources for assessment

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 general purpose tools and test equipment found in most routine situations would be used where appropriate.

Method of assessment

Guidance information for assessment

Submission Requirements

List each assessment task's title, type (eg project, observation/demonstration, essay, assingnment, 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.

Required skills

Look for evidence that confirms skills in:

applying relevant OHS procedures, including the use of MSDS and PPE

using relevant maintenance documentation and aircraft manuals

recognising external and internal signs of defects in two stroke petrol aircraft engines, components and system components through visual/physical inspection

assisting with testing of two stroke petrol engine and engine system operation, be able to operate systems, monitor indications, record parameters and recognise correct function

compiling engine condition monitoring records

rigging and adjusting engine controls and systems

using fault diagnosis guides and equivalent data to accurately and efficiently troubleshoot the causes of unserviceabilities in two stroke petrol engines and engine systems, clearly record details and identify the required rectification actions

correctly removing and installing two stroke petrol engine and engine components

Required knowledge

Look for evidence that confirms knowledge of:

OHS procedures associated with engine maintenance, including lifting and handling of heavy objects and how to obtain MSDS and PPE

fault diagnosis techniques

two stroke petrol aircraft engine layout and operation:

principles of operation of two stroke engines

component function, construction and materials

engine operation

engine power, efficiency and performance

two stroke aircraft engine fuels, oils and fuel/oil mixing

components, layout and operation of two stroke petrol aircraft engine:

fuel systems

ignition systems:

magneto

coil

spark plugs

ignition harnesses

switches

starting systems

induction systems

cooling systems (liquid and air)

exhaust systems

electrical and instrument system interfaces:

battery charging system

tachometer

removal and installation procedures for two stroke petrol aircraft engines and engine components

petrol two stroke aircraft engine maintenance requirements and troubleshooting

relevant maintenance manuals

relevant regulatory requirements and standard procedures

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, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.

Note

Range statements listed below are numbered to facilitate specification of the assessment requirements included in the Evidence Guide

Two stroke engines and components/systems

Two stroke petrol engines and components/systems may include:

1. Two stroke petrol aircraft engines, main components, including reduction gearboxes and accessories/drives

2. Ignition system

3. Control system

4. Starter system

5. Fuel, air systems

6. Cooling system (liquid or air as applicable to enterprise)

7. Exhaust system

Testing of engines

Testing of engines fitted to helicopters (where auxiliary drive is not available) may be carried out through the applicant directing a pilot qualified on type

Troubleshooting

Troubleshooting involves the use of test sets, downloaded maintenance data and fault-finding charts or similar, to line replacement level

Application of this unit may relate to:

scheduled or unscheduled maintenance

individual or team-related activities

Procedures and requirements

Refer to 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
Isolation tags already attached to the system or related systems are checked and aircraft/engine configured for safe system inspection and operation in accordance with applicable maintenance manual 
Two stroke petrol engineand components/systems are visually or physically checked for external and internal signs of defects in accordance with applicable maintenance manual 
Aircraft and engine are correctly prepared in accordance with applicable maintenance manual 
Assistance is provided with engine and/or system operation during prescribed test procedures to establish serviceability and correct function in accordance with applicable maintenance manual 
Available information from maintenance documentation and inspection and test results is used, where necessary, to assist in fault determination 
Maintenance manual fault diagnosis guide and logical processes are used to ensure efficient and accurate troubleshooting 
Specialist advice is obtained, where required, to assist with the troubleshooting process 
Two stroke petrol engine faults are located and the causes of the faults are clearly identified and correctly recorded in maintenance documentation, where required 
Fault rectification requirements are determined to assist in planning the repair 
Aircraft is prepared and supported and rendered safe in accordance with the applicable maintenance manual and isolation tags are fitted, where necessary, to ensure the safety of personnel and freedom from damage during engine removal 
Removal is carried out in accordance with the applicable maintenance manual 
Engine is tagged and prepared for transport or storage in accordance with the specified procedures 
Required maintenance documentation is completed and processed in accordance with standard enterprise procedures 
Engine to be installed is checked to confirm correct part or model numbers, modification status and serviceability 
Installation is carried out in accordance with the applicable maintenance manual 
Support/safety equipment is removed at the appropriate time to ensure personnel safety and freedom from structural damage 
Required maintenance documentation is completed and processed in accordance with standard enterprise procedures 

Forms

Assessment Cover Sheet

MEA361A - Maintain aircraft two stroke petrol engines
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

MEA361A - Maintain aircraft two stroke petrol engines

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: