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Mechanical, avionics & structures
Mechanical, avionics or structures?Choose your maintenance path.
Your trade, workplace and licence goal are related choices. Understand how aircraft maintenance differs from component work, and where Certificate IV and diploma streams fit.
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Enquire about team trainingThree trades. Different work.
01
Mechanical
Engines, airframes & mechanical systems
- Trade qualification
Certificate IV · Mechanical
Choose the aircraft or component stream and units suited to the work. Aircraft streams distinguish aeroplane / helicopter and turbine / piston work.
Certificate IV pathways → - Units & further training
Diploma · Mechanical
A licence-aligned unit set can contribute to the chosen B1 subcategory.
Diploma & licensing streams → - Licensing relationship
B1.1 / B1.2 / B1.3 / B1.4
Turbine aeroplane / piston aeroplane / turbine helicopter / piston helicopter.
02
Avionics
Electrical, instruments & electronic systems
- Trade qualification
Certificate IV · Avionics
Aircraft and component work require different task access. Select the applicable stream and units within the qualification rules.
Certificate IV pathways → - Units & further training
Diploma · Avionics
A licence-aligned unit set can contribute to the B2 pathway.
Diploma & licensing streams → - Licensing relationship
B2
Fixed-wing and rotary qualification streams do not create separate B2 licence subcategories.
03
Structures
Metal, composites & structural repair
- Trade qualification
Certificate IV · Structures
Build the structural fabrication, inspection and repair skills required by the trade and selected units.
Certificate IV pathways → - Units & further training
Further study · mapped individually
For a B1 goal, assess relevant credit and plan the additional mechanical, knowledge and experience requirements.
Diploma & licensing streams → - Licensing relationship
A trade, not a separate licence
There is no standalone Part 66 structures category. A structures qualification does not automatically award B1 privileges.
Unit selection follows qualification packaging rules, workplace task access and the intended outcome. A qualification does not itself issue a licence: the applicable CASA exams, competence, practical experience and application requirements still apply.
The other choice · where the work happensOn wing.
On wing.
Off wing.
The trade is one choice. The aircraft or component maintenance stream is another.
On wing
Aircraft maintenance
Work on the aircraft in line or base maintenance: inspect, troubleshoot and rectify. Plan the qualification stream around the fleet, tasks and intended licence scope.
Off wing
Component maintenance
Work on removed engines, instruments, propellers or accessories in a workshop. Component training and authorisations differ; plan any remaining operating-aircraft experience needed for a Part 66 licence.
Understand the outcome
Certificate IV, diploma and licence: different outcomes.
Certificate IV
The trade qualification assesses the skills and knowledge for the selected Aeroskills stream. Mechanical, avionics and structures are different qualifications or specialisations; the chosen aircraft or component stream must match the work and assessment access.
Explore Certificate IV pathways →
Diploma
Aeroskills diplomas develop higher-level competencies in the selected field. Where a licensing stream applies, the units can contribute to a Part 66 training pathway. The qualification alone does not satisfy every licensing requirement.
Explore diploma pathways →
CASA Part 66 licence
CASA grants the licence after the applicable knowledge, competency, practical experience and application requirements are met. The category, exclusions and type ratings define the scope of certification privileges.
Explore CASA licence pathways →
Match the pathway to the job
Start with the work
you’ll actually do.
01
The workplace
Aircraft or component workshop? Identify the fleet, systems and tasks your employer can provide.
02
The trade
Match that work to mechanical, avionics or structures, then choose the relevant qualification stream.
03
The licence goal
If you want to certify aircraft maintenance, map the intended B1 or B2 scope and the remaining knowledge, operating-aircraft experience and evidence.
Before you choose
Three distinctions
worth getting right.
The course name, trade outcome and licence privileges are not interchangeable. Settle these points before choosing your training.
Structures or mechanical?
Structures is a specialist trade with its own qualification. Structural tasks can fall within mechanical licence privileges, but a structures qualification does not itself give you a mechanical licence.
Does a “licence stream” issue a licence?
No. It contributes to the licensing pathway. You still need to meet the applicable units, module exams, experience and application requirements.
Can component experience count?
Relevant experience may contribute where accepted. Part 66 basic experience also includes maintenance on operating aircraft, so a workshop-based engineer needs a plan for any remaining aircraft experience.
Check before you enrol
Be clear about what the course leads to.
Ask for the qualification or units awarded, the licensing requirements covered and the experience you must still obtain.
Sigma Aerospace College
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