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Simulated workplace
Scenario · Avionics and Electrical

Troubleshoot and rectify an inoperative navigation light

You are an avionics trade assistant working toward your licence.

Intermediate2 to 3 hours7 tasks
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Home/Scenarios/Troubleshoot and rectify an inoperative navigation light
The situation

What has happened

Coral Coast Air Charter's twin piston aircraft VH-CCX has a left navigation light reported inoperative on a night pre-flight check, logged as DEF-26-0412 with work order WO-26-1184 raised. The aircraft has a night charter on Friday. Ahmed Farouk wants a logical troubleshooting sequence from the wiring diagram, starting with the lamp and working back through the connector, wiring, switch and circuit breaker, with every test and result recorded. The bench multimeter MM-008 is withdrawn for overdue calibration, so a calibrated meter must be drawn from the register, and any part fitted must come from the bonded store with its batch recorded.

Your brief. Troubleshoot the navigation light circuit using the approved wiring data and calibrated test equipment, rectify the fault with correctly documented parts, perform the functional check and record the work for inspection and certification.
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Tasks

Deliverables

  • Troubleshooting sequence with readings
  • Work order record with parts and batch
  • Updated defect log entry
  • Tool sign out and return record

Documents to use

Systems to use

Aircraft Work Orders

The register of line and base maintenance work orders and check inputs for every customer aircraft with their status and certifying engineer.

Defect and Deferred Defect Log

The log of pilot reported and maintenance found defects, their assessment, rectification and any deferral limits.

Parts and Bonded Store Register

The register of parts received, inspected, stored, issued and quarantined with their release documentation and traceability.

Tool Control and Calibration Register

The register of special tools, ground equipment and measuring and test equipment with calibration status, location and loan records.

For trainers and assessors

Units of competency

Current on training.gov.au for the Aeroskills Training Package as at 10 September 2026.

MEAAVI0008Inspect, test and troubleshoot basic aircraft electrical systems and components
MEA107Interpret and use aviation maintenance industry manuals and specifications
MEA157Complete aviation maintenance industry documentation
MEA156Apply quality standards during aviation maintenance activities

Qualifications

MEA40618Certificate IV in Aeroskills (Avionics)
MEA50118Diploma of Aeroskills (Avionics)
Assessor notes

What to look for

Evidence guide

Look for a written troubleshooting sequence derived from the wiring diagram, readings recorded at each point rather than a jump to replacing the lamp, and correct isolation and power application. The part must be traced from the register to the work order. The functional check and the defect log update must be complete and the work presented for certification rather than self certified.

The student's evidence summary lists every record they created or changed in the systems named above, their notes and the tasks they ticked. Verify it against the deliverables and your own assessment tool.