MEAAVI0051 — Maintain light aircraft AC-powered instrument systems and components

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What an assessment for MEAAVI0051 must cover

74 assessable components: 4 elements (20 performance criteria), 25 performance evidence and 26 knowledge evidence requirements, plus 3 foundation skills. An audit-defensible tool maps every question and task back to these — that mapping is the coverage matrix Auditori generates alongside the assessment.

Elements & performance criteria

1 Inspect light aircraft AC instrument systems, power supplies and components

1.1Identify specific inspection requirements using maintenance documentation and modification status, including relevant system defect reports to identify specific inspection requirements
1.2Check isolation tags and configure aircraft for safe system inspection and operation in accordance with maintenance manual
1.3Visually or physically check AC instrument system and AC power supply components for external signs of defects in accordance with maintenance manual while observing all relevant work health and safety (WHS) requirements
1.4Identify and report defects in accordance with standard enterprise procedures

2 Test and adjust light aircraft AC instrument systems, power supplies and components

2.1Prepare aircraft and system for the application of power or system operation in accordance with maintenance manual
2.2Perform functional testing on instrument system and AC power supply for evidence of serviceability or malfunction in accordance with maintenance manual
2.3Perform required calibration or adjustments to systems in accordance with maintenance manual

3 Troubleshoot light aircraft AC instrument systems, power supplies and components

3.1Use available information from maintenance documentation, inspection and test results to assist in fault determination
3.2Troubleshoot to line replacement level using maintenance manual fault diagnosis guides and logic processes, test sets, downloaded maintenance data and fault-finding charts or similar
3.3Obtain required specialist or supervisory advice to assist with the troubleshooting process
3.4Locate instrument system or power supply faults and identify and record causes of faults in required maintenance documentation in accordance with standard enterprise procedures
3.5Determine requirements for rectification of faults

4 Remove and install light aircraft AC instrument system, and power supply components

4.1Render system safe and prepare it in accordance with the applicable maintenance manual, fitting required isolation tags to ensure personnel safety
4.2Remove instrument or power supply component in accordance with the applicable maintenance manual while observing all relevant WHS requirements
4.3Complete and process required maintenance documentation relating to removal in accordance with standard enterprise procedures
4.4Tag and pack removed components in accordance with specified procedures
4.5Confirm correct part numbers, modification status, serviceability and shelf life of instrument or power supply components to be installed against maintenance manual
4.6Perform physical installation of instrument or power supply components in accordance with maintenance manual and regulatory requirements, ensuring required appropriate adjustment or alignment is carried out
4.7Reinstate system to correct operational condition in preparation for required testing
4.8Complete and process required maintenance documentation in relation to installation in accordance with standard enterprise procedures

Performance evidence

maintain light aircraft alternating current (AC) powered instrument systems and components during scheduled or unscheduled maintenance on a system and at least one major system component or line replaceable unit (LRU) from each of the following groups:
directional gyro (DG), artificial horizon (AH), altitude heading and reference system (AHRS) and components, servo and encoding altimeters, remote reading gyro compasses and components
piston engine and gas turbine engine indication system components
fuel quantity indication and flow indication systems and components
transmitter/indicator measuring instrument systems (pressure, temperature, vacuum) and components
inverters and transformer/rectifier units.
locate and identify AC-powered instrument system components for the systems being maintained including:
AH, DG, AHRS, servo and encoding altimeters
engine system temperature, speed, oil pressure, torque and manifold pressure
auxiliary systems, including vacuum, fuel storage quantities and fuel flow
remote reading gyro compasses
locate and identify AC instrument power supply system components for the systems being maintained, including:
inverters
transformer/rectifier units
voltage and frequency indication
correctly handle and observe maintenance precautions for gyroscopes and gimbals
recognise system and component defects, external damage, correct/incorrect installation, connection of plugs, terminations, attachment hardware (including cabling/harnesses) and security in AC-powered instruments and related power supply, including:
flight instruments
remote reading gyro compasses
piston engine and gas turbine engine indication systems (indicators and transmitters or sensors)
fuel quantity and flow indication systems (indicators, probes and transmitters)
transmitter/indicator measuring instrument systems (pressure, temperature and vacuum)
AC power supply, including inverters and transformer or rectifier units
perform functional testing by applying logic processes, taking and interpreting system measurements, using test equipment and appropriate wiring diagrams and manuals to isolate malfunctions in the above systems and assess post-maintenance serviceability
apply testing procedures, cleanliness requirements and safety precautions at all times, and as relevant to the system/s being maintained, including correct handling and observing maintenance precautions for gyroscopes and gimbals.

Knowledge evidence

component attachment methods
connection of hardware and plugs
handling precautions for electrostatic sensitive devices
work health and safety (WHS) practices for light aircraft AC powered instrument systems and components
AC theory, including:
calculations and measurement in AC circuits
inductors and inductive reactance
transformer operation
capacitors and capacitive reactance
LCR circuits and resonance
passive filters
power relationship in reactive circuits
the basic layout (block diagram level), function and operation of AC-powered:
flight instruments
remote reading gyro compasses
piston engine and gas turbine engine indication systems (indicators and transmitters or sensors)
fuel quantity and flow indication systems (indicators, probes and transmitters)
transmitter/indicator measuring instrument systems (pressure, temperature and vacuum)
AC power supply including AC generators, inverters and transformer/rectifier units
the operating principles of the above systems and associated with:
atmospheric conditions – properties and effects on aircraft instruments and systems
pressure and temperature sensing elements and their use in aircraft instrument systems
gyroscopes and their use in aircraft instrument systems
electrical fundamentals
relevant maintenance documentation and maintenance publications
maintenance requirements and troubleshooting procedures.

Foundation skills

Reading skills: Reading skills to interpret maintenance manuals, inspection procedures and specifications (allowable limits).
Writing skills: Writing skills to record and report on defects and faults and their causes.
Numeracy skills: Numeracy skills to interpret and communicate technical information and take and interpret system measurements.

Unit content sourced from training.gov.au — © Commonwealth of Australia, licensed under CC BY 4.0. Auditori is not affiliated with the Department of Employment and Workplace Relations.

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Questions about assessing MEAAVI0051

What does an assessment tool for MEAAVI0051 need to cover?

To satisfy the Principles of Assessment and Rules of Evidence, an assessment for MEAAVI0051 needs to address all 74 unit components: 4 elements with 20 performance criteria, 25 performance evidence requirements, 26 knowledge evidence requirements, and the foundation skills. A coverage matrix mapping each question and task to these components is what an auditor looks for.

How does Auditori generate an assessment tool for MEAAVI0051?

Auditori pulls the current release of MEAAVI0051 from training.gov.au and generates a complete package: candidate assessment, assessor guide with model answers and observation criteria, and a coverage matrix mapping every component. A suitably qualified person then reviews and approves the draft in a built-in workflow — consistent with ASQA's guidance on AI use in VET — before export as branded PDF and editable Word.

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Can I check my existing MEAAVI0051 assessment instead of generating a new one?

Yes — upload your existing assessment or learner guide and Auditori maps it against every element, performance criterion, PE and KE of MEAAVI0051, showing exactly what's covered and what's missing. Mapping costs a quarter of a credit.

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