Assessor Resource

MEA228C
Test and troubleshoot aircraft instrument systems and components

Assessment tool

Version 1.0
Issue Date: May 2024


This unit requires application of hand skills, standard trade practices and systems knowledge in the testing and troubleshooting of aircraft instrument and display systems and components during both scheduled and unscheduled maintenance.

Applications include instrument and display systems and components fitted to both fixed and rotary wing aircraft.

This unit is part of the Avionic AME Certificate IV training pathways. It covers the competencies required to test and troubleshoot aircraft instrument and display systems and components. Where a CASA licensing outcome is sought this unit forms part of the CASA requirement for the granting of the B2 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)

Co-Requisites

MEA224B

Inspect aircraft instrument systems and components

MEA226C

Inspect aircraft electronic systems and components

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 test and troubleshoot a range of instrument and display systems and components that is representative of the scope of the listed variables in accordance with relevant maintenance manual instructions while applying all relevant OHS procedures and standard processes. Coverage of display systems is required only where applicable to the enterprise.

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 and troubleshooting applications (including the timely involvement of supervisors or other trades) associated with aircraft instrument and display systems and their components. It is essential that system testing procedures, cleanliness requirements and safety precautions applicable to the system being maintained are fully observed, understood and complied with. Ability to interpret inspection procedures and specifications (allowable limits) and apply them in practice is critical.

Evidence of transferability of skills and knowledge related to inspection, testing and troubleshooting is essential. This may be demonstrated through application across a range of aircraft instrument and display systems (where display systems are applicable to the enterprise) listed in the Range Statement. 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.

A person cannot be assessed as competent until it can be demonstrated to the satisfaction of the workplace assessor that the relevant elements of this Unit of Competency are being achieved under routine supervision on a system and on at least one major system component of each Group 1 to 6 (Groups 5 and 6 may be omitted if not applicable to the enterprise), as 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 .

Context of and specific resources for assessment

Competency should be assessed in the work environment or simulated work environment, using procedures, tools and equipment specified in maintenance documentation. It is also expected that general purpose tools, test and ground support equipment found in most routine situations would be used where appropriate. The level of troubleshooting is limited in its application to the use of fault diagnosis guides or other similar information to enable troubleshooting to line replaceable item level

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:

Use of hand skills, tools and test equipment in the testing, adjustment and troubleshooting of instrument and display systems

Recognition of system and component defects/external damage, correct installation, connection of plugs, terminations, attaching hardware (including cabling/harnesses) for the systems listed in Range Statement

Interpreting the information presented on instrument and display systems

Applying logic processes and using appropriate wiring diagrams and manuals to isolate instrument and display system malfunctions

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

The effective use of maintenance documentation and relevant fault diagnosis guides in the troubleshooting process

Application of standard procedures

Observance of all relevant occupational health and safety (OHS) procedures

Required knowledge

Look for evidence that confirms knowledge of:

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

The basic layout (block diagram level) of the systems listed in the Range Statement

The operating principles of the systems listed in the Range Statement and associated with the properties and effects of atmospheric conditions on aircraft instruments and systems, pressure and temperature sensing elements and their use in aircraft instruments, gyroscopes and their use in aircraft instrument and reference systems, electrical fundamentals and display screen generation

The various methods of navigation and how they are used by both conventional and electronic navigational instruments and systems

OHS procedures relating to instrument and display systems and components

Relevant maintenance manuals

Relevant regulatory requirements and standard procedures, including software management control

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.

Instrument or display systems

Instrument or display systems may include:

1. Flight instruments - pitot/static systems, airspeed indicators (ASIs) machmeters, air data systems and instruments, vertical speed indicators (VSIs), altimeters, altitude alerting and reporting, turn and bank, directional gyros (DGs), artificial horizons (AHs), angle of attack, stall warning/avoidance, ground proximity warning system (GPWS), flight data recorders (FDRs

2. Engine Instruments - engine speed, pressure, temperature, performance, vibration, torque

3. Instrument navigation systems - inertial navigation systems (INS), inertial reference systems, compasses, attitude heading reference system (AHRS)

4. Miscellaneous - pressure, fuel quantity, fuel flow, position, voltage, frequency, current, power

5. Display systems - electronic flight instrument systems (EFIS), engine indicating and crew alerting systems (EICAS), flight management computer systems (FMCS), electronic centralised aircraft monitor (ECAM), head-up display (HUD)

6. Integrated modular avionics

Troubleshooting

Troubleshooting involves the use of fault finding charts or similar, to line replacement level.

Application of this unit may relate to:

Scheduled or unscheduled maintenance activities

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
Relevant maintenance documentation and modification status, including system defect/ service difficulty reports where relevant, are interpreted to identify an unserviceability. 
The aircraft and systems are correctly prepared, in accordance with specified procedures, for the application of power and system operation. 
Instrument or display system is functionally tested, in accordance with specified procedures, for evidence of serviceability or malfunction. 
System calibration or adjustments are performed in accordance with specified procedures. 
Available information from maintenance documentation and 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. 
Specialist advice is obtained, where required, to assist with the troubleshooting process. 
Instrument or display system 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 or adjustment. 

Forms

Assessment Cover Sheet

MEA228C - Test and troubleshoot aircraft instrument systems and components
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

MEA228C - Test and troubleshoot aircraft instrument systems and components

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: