- CAET is the Level 1 credential issued by the Aircraft Electronics Association, delivered through the Unmanned Safety Institute.
- The exam has 100 multiple-choice questions, a 90-minute limit, and a 70% passing score.
- Fees are $119 with virtual proctoring or $109 with an approved physical proctor.
- Purchase covers up to three attempts, with mandatory 24-hour and two-week waiting periods between retakes.
What Is CAET, Exactly?
CAET stands for Certified Aircraft Electronics Technician. It is the entry-level, Level 1 credential offered by the Aircraft Electronics Association (AEA) for technicians who install, maintain, troubleshoot, and repair avionics and aircraft electronics systems. It is distinct from the AET upgrade path and from the CAET-Advanced assessment - this article, and the exam it describes, refers specifically to the base Level 1 CAET.
The credential exists to give employers, maintenance shops, and technicians themselves a standardized way to verify hands-on and theoretical competency across the core disciplines of aircraft electronics work. If you're still deciding whether this is the right acronym and credential for your career goals, our companion piece on CAET Meaning unpacks the terminology in more depth, and What Is A CAET? covers what the role looks like day to day.
Who Administers the CAET Exam
The Aircraft Electronics Association owns and defines the CAET credential, but the exam itself is delivered by the Unmanned Safety Institute (USI). For proctoring, AEA identifies GMetrix as the primary virtual proctoring provider, while also permitting approved physical proctors at qualifying test locations. This dual-path setup gives candidates flexibility: test from a controlled remote setup or arrange an in-person proctored session, depending on what's available and more affordable in your area.
Because two organizations are involved - AEA as the credentialing body and USI as the delivery partner - candidates sometimes find registration details scattered across multiple pages. If you want a single, organized breakdown of eligibility rules before you register, see CAET Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Exam Format and Delivery Options
The CAET exam consists of 100 multiple-choice questions administered in a 90-minute window. There are no scenario-based simulations or hands-on practical stations in the base Level 1 exam itself - it is a knowledge assessment delivered on a computer. Passing requires a score of 70% or higher.
There are no formal prerequisites to sit for CAET. You don't need a specific degree, a minimum number of years in the field, or a sponsoring employer to register. That open-door structure is part of what makes this credential accessible to technicians early in their careers, though the exam content assumes a working familiarity with avionics fundamentals.
Remote Testing Requirements
If you test virtually through GMetrix proctoring, you'll need:
- Government-issued photo identification
- A working webcam and microphone
- A clear room scan before the session begins
- Compatible proctoring software installed and running
Chromebooks and tablets are not supported for remote testing - you'll need a standard laptop or desktop computer. A non-phone calculator is permitted during the exam, which matters for the electrical theory and pitot-static calculations you'll encounter.
Key Takeaway
Test on a supported laptop or desktop, not a tablet or Chromebook, and bring a dedicated calculator rather than relying on a phone app if you choose the virtual proctoring path.
The Eight CAET Domains
CAET content is organized into eight official topic areas. Understanding what each domain actually covers - not just its title - is the difference between generic exam prep and targeted study. For a deeper breakdown of each area with sample question styles, our dedicated CAET Exam Domains 2026: Complete Guide to All 8 Content Areas guide is worth bookmarking.
Domain 1: Maintenance Procedures & Regulatory Requirements
Covers documentation practices, applicable regulatory frameworks, and the procedural discipline expected of technicians performing avionics maintenance.
- Know how maintenance records and regulatory compliance intersect with day-to-day repair work.
Domain 2: Basic Electrical Theory & Systems
Foundational electrical concepts - circuits, components, and system behavior - that underpin nearly every other domain on the exam.
- Master Ohm's law applications and basic circuit analysis before moving to more specialized systems.
Domain 3: CNS - Communication, Navigation & Surveillance Systems
Focuses on the avionics systems responsible for communication, navigation, and surveillance functions aboard aircraft.
- Understand how CNS components interact within the broader avionics architecture.
Domain 4: Flight Instrument & Pitot-Static Systems
Covers flight instruments and the pitot-static system, including how pressure-based instruments derive their readings.
- Be comfortable with pitot-static system troubleshooting logic.
Domain 5: Digital Databus Systems
Tests knowledge of digital data communication standards used across modern aircraft electronics.
- Review how databus architecture supports data exchange between avionics units.
Domain 6: Aircraft Wiring, Hardware & Installation
Covers wiring practices, hardware selection, and proper installation techniques for avionics equipment.
- Study correct wire termination, connector types, and installation standards.
Domain 7: Tools, Test Equipment & Measurement Techniques
Focuses on the proper use of diagnostic tools and measurement equipment common in avionics shops.
- Know which test equipment applies to which diagnostic scenario.
Domain 8: Safety, Housekeeping & Best Practices
Covers workplace safety protocols, housekeeping standards, and general best practices in the aircraft electronics environment.
- Review standard safety procedures specific to avionics maintenance settings.
Because the exam blends theory-heavy domains (like Domain 2 and Domain 5) with practice-oriented ones (like Domain 6 and Domain 7), candidates who've never sat a large-scale multiple-choice knowledge exam sometimes underestimate the pacing challenge. If you're wondering how tough this really is compared to other technical certifications, How Hard Is the CAET Exam? Complete Difficulty Guide 2026 walks through that comparison in detail.
Registration, Fees, and Attempt Rules
CAET registration runs through the Unmanned Safety Institute's course catalog. The exam fee depends on your proctoring choice:
| Proctoring Option | Fee | Notes |
|---|---|---|
| Virtual (GMetrix) | $119 | Requires webcam, mic, room scan, and supported device |
| Approved physical proctor | $109 | In-person testing at an approved location |
Every purchase includes up to three total attempts. If your first attempt doesn't clear the 70% threshold, you must wait 24 hours before attempting again. If a third attempt is needed, you must wait two weeks after the second attempt. All testing - first attempt through third, if used - must be completed within 90 days of purchase, so plan your study timeline with that window in mind.
For a complete cost comparison including what happens if you need to repurchase after the 90-day window closes, read CAET Certification Cost 2026: Complete Pricing Breakdown. And if you're still nailing down exactly what score you need and how it's calculated, CAET Passing Score 2026: Exactly What You Need to Pass breaks down the 70% requirement question by question.
Who Should Pursue CAET
Because there are no formal prerequisites, CAET attracts a wide range of candidates: technicians entering avionics maintenance shops, professionals transitioning from general aircraft maintenance into electronics-focused roles, and students coming out of aviation maintenance training programs who want a credential that signals readiness on day one.
Employers in avionics repair stations, MRO (maintenance, repair, and overhaul) facilities, and general aviation service centers commonly look for candidates who hold - or are working toward - a recognized avionics credential. If you're evaluating whether the certification actually moves the needle on hiring and pay, CAET Jobs and CAET Salary Guide 2026: Complete Earnings Analysis both dig into that question from different angles, and Is the CAET Certification Worth It? Complete ROI Analysis 2026 weighs the cost against the career upside.
A Domain-Driven Study Approach
Rather than studying generically, it helps to sequence your preparation around the eight domains, front-loading the ones with the most conceptual weight and saving hands-on-familiar domains for closer to test day.
Foundational Theory
- Work through Domain 2 (Basic Electrical Theory & Systems) since it underlies later CNS and databus material
- Review Domain 1 regulatory and documentation basics
Systems Deep Dive
- Study Domain 3 (CNS systems) and Domain 4 (Flight Instrument & Pitot-Static Systems)
- Practice pitot-static troubleshooting scenarios with a calculator on hand
Hardware and Digital Systems
- Cover Domain 5 (Digital Databus Systems) and Domain 6 (Wiring, Hardware & Installation)
- Review tool usage under Domain 7
Consolidation
- Finish with Domain 8 (Safety, Housekeeping & Best Practices)
- Take full-length practice runs under timed, 90-minute conditions
Spacing your review this way - rather than cramming all eight domains in one pass - mirrors how the material actually connects: electrical theory supports CNS and databus comprehension, and safety practices are easier to retain once you've already handled the hardware and tooling content. For a more detailed week-by-week plan with practice question strategy, see CAET Study Guide 2026: How to Pass on Your First Attempt. You can also build exam-day familiarity ahead of time using full-length practice exams on our CAET practice test platform.
Key Takeaway
Sequence your review so electrical theory (Domain 2) comes first - it's the conceptual backbone for CNS, pitot-static, and databus questions later in the exam.
Keeping CAET Current: Renewal Requirements
CAET certification is valid for three years. To renew, you need 18 Continuing Education Hours (CEHs) within that cycle. Alternatively, earning an approved higher CAET credential or passing the online recertification exam also satisfies the renewal requirement for that cycle, giving you more than one path to stay current depending on where your career is headed.
This renewal structure means CAET isn't a one-time credential you earn and forget - it's designed to track ongoing engagement with the field. Planning your CEHs alongside your initial certification prep can save you a scramble near the three-year mark.
For candidates still mapping out their testing calendar around work schedules and the 90-day completion window, CAET Exam Dates 2026: Testing Windows, Deadlines & Scheduling lays out the scheduling mechanics in more detail. And once you're deep into review, a condensed reference like CAET Cheat Sheet 2026: One-Page Review of Must-Know Facts can help with last-minute domain recall alongside practice sessions on CAET Exam Prep.
Frequently Asked Questions
CAET stands for Certified Aircraft Electronics Technician, a Level 1 credential from the Aircraft Electronics Association delivered through the Unmanned Safety Institute. For more on the acronym itself, see What Does CAET Stand For?
The CAET exam has 100 multiple-choice questions with a 90-minute time limit. You need a score of 70% or higher to pass.
No. CAET has no formal prerequisites, which means candidates can register and test without prior certification, a specific degree, or a set number of years of experience.
The exam costs $119 with virtual GMetrix proctoring or $109 if you use an approved physical proctor. Your purchase includes up to three total attempts within a 90-day window.
You can retake it after a 24-hour waiting period. If you need a third attempt, a two-week wait applies after the second attempt, and all attempts must be completed within 90 days of your original purchase.