CASA exclusion removals explained: category, type ratings and E1/E4/E5

If you have searched for “CASA exclusion removals”, you have probably found a mixture of course advertisements, old transition advice and explanations aimed at a particular aircraft. The useful starting point is your own licence, the work you want to certify and the evidence you already hold.

This guide explains the distinction, the E1/E4/E5 questions that commonly arise, and how Sigma can help you build a supported RPL and gap training plan.

Category or type rating: where is the exclusion?

An exclusion limits the systems covered by your certification privileges. Before choosing training, read the exact wording on your current licence.

For example: a B1.3 engineer may have E1/E4/E5 cleared from the category while those exclusions remain against an existing helicopter type rating. The type-rating entry still needs attention. CASA explains this distinction in its Part 66 AMC/GM.

What do E1, E4 and E5 mean?

These codes concern electrical and instrument scope. They are often discussed together, but they describe different restrictions.

Use the CASA exclusion tables for the full wording and category-specific requirements. Do not assume a B1 and B2 engineer need the same training simply because the code matches.

Can you remove CASA exclusions through self-study?

Yes, for licence category or subcategory exclusions. CASA’s self-study guidance, updated on 7 August 2026, identifies both the Part 147 MTO and self-study pathways. Self-study involves the applicable basic knowledge exams and practical evidence; an exam pass alone is not the complete outcome. See CASA’s self-study guidance.

Compare the two in our CASA self-study versus supported Part 147 guide. A modular or full category outcome is a separate choice from how you train.

How do type-rating exclusion removals work?

Type-rating exclusion removal follows the approved aircraft-specific route, rather than the category self-study logbook route. CASA identifies relevant theory, exams, practical training and assessment, with training through a Part 147 MTO or an appropriately approved Part 145 AMO. See CASA’s type-rating exclusion guidance.

Have you already completed a full B1 type theory course? Have that record reviewed before booking theory again. CASA’s AMC/GM includes provision for previously completed full B1 theory and distinguishes the practical requirements for your first unrestricted type scope from later ratings. POC, PCT and OJT are different practical arrangements; the applicable combination depends on your circumstances.

Ask the approved provider to confirm which prior credits are accepted, what remains, which journal applies and who will assess it. That is more useful than relying on a blanket “three years”, “five years” or “one journal fixes everything” answer. The detail is in Appendix B.3.4 of CASA’s Part 66 AMC/GM.

How Sigma plans your exclusion removal

Our category exclusion training starts with the engineer, not a generic timetable. You may have substantial experience on the excluded system; the task is to establish what can be recognised and what still needs to be taught or assessed.

1. Show us the starting point.

   Provide your current licence, exclusion codes, qualifications, statements of attainment and relevant training records.

2. Map the evidence.

   We review your background against the intended scope. Include practical records and explain which aircraft and systems you can access at work.

3. Complete the gaps with support.

   Work through the required learning, unit assessments, exams and practical evidence in your agreed plan. Existing experience is assessed properly; it is not a reason to skip a requirement.

4. Prepare the licensing evidence.

   Once the required training and assessment is complete, the applicable reporting and application steps follow. CASA makes the licensing decision.

Read more about Sigma’s RPL and gap process and how we assess knowledge and practical competence.

How long does exclusion removal take, and what does it cost?

There is no useful single answer before the scope and evidence are checked. An engineer with relevant records and ready access to the remaining practical tasks has a different starting point from someone who needs training and access to another aircraft or system.

Ask for a quote that separates the category work from any type-rating work. Check whether it includes assessment, learning materials, exams, journal review and reporting. Also allow for any travel, practical access and CASA application fees. Compare the work required to reach your intended outcome, not just the advertised course fee.

Tell us what work you need to be able to certify, your roster and any deadline. We can then discuss a realistic training plan and the dependencies that could affect it.

Which CASA application and evidence do you need?

CASA’s current Form 546 (July 2026) covers category and type-rating exclusion removal and identifies the supporting documents for each route. These can include Form 465 or a Document of Record for approved training, or exam evidence and the relevant completed exclusion-removal logbook for self-study. The form also points applicants to myCASA.

Check the latest form and its instructions when you apply. Older advice may refer to transition arrangements, journals or deadlines that no longer apply.

A few questions before you book

Sources checked 28 October 2026: CASA’s exclusion-removal guidance (9 July 2026), self-study guidance (7 August 2026), Form 546 v2.1, the current Part 66 MOS and Part 66 AMC/GM. Source links appear beside the relevant explanations.