- Eligibility Overview: Who Can Sit for the CAET
- Why There Are No Formal Prerequisites
- Registration, Fees & Attempt Rules
- Remote Testing Technical Requirements
- The Eight Domains You're Qualifying On
- A Realistic Path to Qualifying
- Staying Qualified: Recertification Requirements
- Who Actually Pursues This Credential
- Frequently Asked Questions
- The base Level 1 CAET has no formal prerequisites - no degree, license, or experience required.
- Exam costs $119 with virtual proctoring or $109 with an approved physical proctor.
- You get up to three attempts per purchase, with a 24-hour wait before attempt two and two weeks before attempt three.
- All testing must be completed within 90 days of purchase, so timing your prep matters.
Eligibility Overview: Who Can Sit for the CAET
If you've searched for "CAET requirements" expecting a list of degrees, licenses, or years of hangar time you need before you're allowed to test, the actual answer is simpler than most candidates expect. The base Level 1 CAET, administered under the Aircraft Electronics Association (AEA) and delivered through the Unmanned Safety Institute (USI), does not gate access behind formal prerequisites. Anyone who registers and pays the exam fee can sit for it - the "requirement" is really about being prepared to pass, not being permitted to attempt.
This is a meaningful distinction from many aviation maintenance credentials, where eligibility itself is the hard part. With the CAET, eligibility is open; competence is what you have to prove inside a 90-minute, 100-question exam. That shifts the real qualifying work from paperwork to preparation - understanding the eight exam domains and knowing exactly what a passing score requires.
Why There Are No Formal Prerequisites
The absence of prerequisites doesn't mean the exam is trivial - it means AEA built the base-level credential as an entry point for people at different stages of an avionics career: apprentices building foundational knowledge, technicians transitioning from general aviation maintenance into electronics-specific roles, and even students who want a credential to point to before their first shop job.
Because there's no gatekeeping on the front end, the real qualifying filter is the content itself. The exam draws from eight official topic areas covering electrical theory, communication/navigation/surveillance (CNS) systems, digital databuses, wiring practices, test equipment, and safety procedures. Candidates who walk in without hands-on avionics exposure or structured study tend to struggle regardless of how "open" the eligibility rules are. For a full breakdown of how difficult that content actually is in practice, see How Hard Is the CAET Exam?
Key Takeaway
Treat the lack of prerequisites as permission to start studying now, not as evidence the exam is easy. Preparation is the real qualifying step.
Registration, Fees & Attempt Rules
Once you decide to pursue the CAET, the logistics are straightforward but worth understanding before you pay. AEA identifies GMetrix as the virtual proctoring provider, and also permits testing through approved physical proctors - typically at a training center or aviation program location.
- Exam fee: $119 with virtual (remote) proctoring, or $109 if you test with an approved physical proctor.
- Format: 100 multiple-choice questions, 90 minutes, passing score of 70%.
- Attempts included: Up to three attempts per purchase.
- Retake waiting periods: 24 hours before your second attempt; two weeks before your third.
- Testing window: All attempts must be completed within 90 days of purchase.
That 90-day clock is easy to overlook when you're focused on studying, but it directly shapes how you should plan. If you fail on attempt one and wait the full two weeks before a third try, you've already used over two weeks of your window on retakes alone - so front-loading preparation matters more than treating the three attempts as a safety net. A detailed cost comparison, including how fees compare across proctoring options, is covered in CAET Certification Cost 2026: Complete Pricing Breakdown.
Remote Testing Technical Requirements
If you choose virtual proctoring - the more common route for candidates without access to an approved physical proctor - you need to meet specific technical requirements before exam day, not on it. Showing up unprepared on the tech side can cost you a scheduled session entirely.
- Government-issued photo identification for identity verification
- A functioning webcam and microphone
- Ability to perform a full room scan before testing begins
- Proctoring software installed and running correctly on your device
- A supported computer - Chromebooks and tablets are explicitly unsupported
One detail candidates frequently miss: a non-phone calculator is allowed during the exam, which matters given the electrical theory and pitot-static calculations you'll encounter. Bring or have a physical calculator ready rather than assuming your phone will suffice - phones aren't permitted as calculators or otherwise during a proctored session.
Device Compatibility Checklist
Before scheduling your remote session, confirm your setup meets the baseline requirements.
- Laptop or desktop computer (not a tablet or Chromebook)
- Stable internet connection for the full 90-minute session
- A quiet, enclosed room that can be scanned on camera
- Physical, non-phone calculator on your desk
The Eight Domains You're Qualifying On
Since there's no prerequisite checklist, the real "requirements" for passing live inside the eight official topic areas. Understanding what each domain actually demands is the most CAET-specific form of preparation you can do.
Domain 1: Maintenance Procedures & Regulatory Requirements
Covers documentation practices, regulatory compliance, and standard maintenance workflows specific to avionics work.
- Recordkeeping and sign-off requirements
- Regulatory references relevant to avionics maintenance
Domain 2: Basic Electrical Theory & Systems
Foundational electrical concepts that underpin every other domain - Ohm's Law, circuit analysis, and component behavior.
- Series and parallel circuit calculations
- Component identification and function
Domain 3: CNS - Communication, Navigation & Surveillance Systems
Covers radios, transponders, navigation aids, and surveillance equipment installed on aircraft.
- System-level function of comm/nav/surveillance boxes
- Interconnection between CNS components
Domain 4: Flight Instrument & Pitot-Static Systems
Focuses on how flight instruments derive readings and how pitot-static systems are tested and maintained.
- Pitot-static system troubleshooting logic
- Instrument error sources
Domain 5: Digital Databus Systems
Tests understanding of how modern avionics communicate digitally across aircraft systems.
- Databus architecture concepts
- Signal and data-flow troubleshooting
Domain 6: Aircraft Wiring, Hardware & Installation
Covers wiring practices, connector hardware, and correct installation techniques.
- Wire gauge and termination standards
- Proper hardware selection for installations
Domain 7: Tools, Test Equipment & Measurement Techniques
Focuses on correct use of multimeters, signal generators, and other diagnostic tools.
- Proper measurement technique and tool selection
- Reading and interpreting test equipment output
Domain 8: Safety, Housekeeping & Best Practices
Covers shop safety practices, ESD precautions, and general best-practice procedures.
- Static-sensitive component handling
- General shop safety protocols
For question-by-question breakdowns of what each domain tests and how heavily it's weighted, the dedicated CAET Exam Domains 2026 guide goes deeper than an overview article can.
A Realistic Path to Qualifying
Because eligibility is open but the content is technical, most candidates benefit from a structured run-up to exam day rather than open-ended studying. The schedule below maps domains to weeks based on where foundational concepts (like electrical theory) need to come before dependent topics (like CNS systems or databuses).
Foundations First
- Review Domain 2 (Basic Electrical Theory & Systems) thoroughly - it underpins nearly every later domain
- Skim Domain 1 (Maintenance Procedures & Regulatory Requirements) for documentation and compliance basics
Systems Layer
- Study Domain 3 (CNS Systems) and Domain 4 (Flight Instrument & Pitot-Static Systems)
- Connect electrical theory concepts to real system behavior
Modern Avionics & Hardware
- Cover Domain 5 (Digital Databus Systems) and Domain 6 (Wiring, Hardware & Installation)
- Practice reading wiring diagrams and installation specs
Tools & Final Review
- Study Domain 7 (Tools, Test Equipment & Measurement Techniques) and Domain 8 (Safety & Best Practices)
- Run full-length practice sessions timed to 90 minutes
This timeline is a starting framework, not a rigid rule - adjust it based on which domains reflect prior job experience versus genuinely new material. A full walkthrough of study tactics tailored to each domain is available in the CAET Study Guide 2026, and you can build timed practice into your routine using full-length practice tests that mirror the 100-question, 90-minute format.
Staying Qualified: Recertification Requirements
Passing the exam qualifies you for three years before you need to demonstrate continued competence. AEA's recertification policy gives you a few ways to satisfy that cycle:
- Earn 18 Continuing Education Hours (CEHs) within the three-year window
- Complete an approved higher CAET credential, which satisfies the cycle automatically
- Pass the online recertification exam instead of accumulating CEHs
This flexibility matters for planning your career long-term - if you're already working toward an advanced credential, that progression can double as your recertification path rather than requiring separate CEH tracking. Full details on cycle timing and CEH documentation are in AEA's official recertification policy referenced on their site.
| Requirement | Detail |
|---|---|
| Formal prerequisites | None |
| Exam format | 100 multiple-choice questions, 90 minutes |
| Passing score | 70% |
| Virtual proctoring fee | $119 |
| Physical proctor fee | $109 |
| Attempts per purchase | Up to 3 |
| Retake wait (2nd attempt) | 24 hours |
| Retake wait (3rd attempt) | 2 weeks |
| Testing completion window | 90 days from purchase |
| Recertification cycle | Every 3 years, 18 CEHs (or equivalent) |
Who Actually Pursues This Credential
Because there are no formal prerequisites, the candidate pool for the CAET is broader than for many aviation credentials. In practice, three groups tend to pursue it:
- Entry-level and apprentice technicians who want a recognized credential before or shortly after starting shop work
- Experienced maintenance technicians moving specifically into avionics-focused roles and wanting to formalize that specialization
- Students in aviation maintenance programs who use the credential to strengthen job applications before graduation
Employers in avionics shops, MRO facilities, and general aviation maintenance operations use the credential as a baseline signal of technical literacy across the eight domains - not as proof of years of experience, since none is required to earn it. If you're weighing whether the credential translates into better job prospects or pay, Is the CAET Certification Worth It? and the CAET Salary Guide 2026 address that question directly, and CAET Jobs looks at where the credential shows up in hiring.
Frequently Asked Questions
No. The base Level 1 CAET has no formal prerequisites regarding experience, education, or licensure. Anyone can register and test.
Your purchase includes up to three attempts, with a mandatory 24-hour wait before the second attempt and a two-week wait before the third. All attempts must occur within 90 days of purchase.
No. Chromebooks and tablets are explicitly unsupported for virtual proctoring. You'll need a standard laptop or desktop computer with a webcam and microphone.