- CAET stands for Certified Aircraft Electronics Technician, an entry-level (Level 1) credential from AEA.
- The exam has 100 multiple-choice questions, a 90-minute limit, and a 70% passing score.
- Registration costs $119 with virtual proctoring via GMetrix or $109 with an approved physical proctor.
- There are no formal prerequisites, but candidates get up to three attempts within a 90-day window.
What Does CAET Mean?
CAET stands for Certified Aircraft Electronics Technician, a Level 1 credential issued through the Aircraft Electronics Association (AEA). It is the base-level certification in the AEA's technician credentialing structure, distinct from the AET upgrade path and the separate CAET-Advanced assessment. If you're wondering what does CAET stand for in the aviation maintenance world specifically, this is it: a documented, exam-based validation that a technician understands core avionics installation, wiring, and troubleshooting principles used in general aviation and business aircraft shops.
This article focuses exclusively on that credential. Other industries use the same four letters for unrelated programs, so if you found this page while researching a different field, none of the facts below will transfer - everything here comes directly from AEA's own CAET program documentation.
Who Administers the CAET Exam
The Aircraft Electronics Association owns the CAET program, but exam delivery is handled by the Unmanned Safety Institute (USI). AEA designates GMetrix as the virtual proctoring platform, though candidates who prefer an in-person option can use an AEA-approved physical proctor instead. Both paths lead to the identical 100-question exam - the difference is logistics and cost, not content.
For a deeper look at how this compares to other credentialing bodies and what "certified" actually means in this context, see What Is CAET Certification? and the broader overview at CAET Certification.
Exam Format and Registration Details
Understanding the exact mechanics matters because CAET's format is different from many other technical certifications - tighter time pressure, a hard attempt cap, and a strict testing window.
- Question count: 100 multiple-choice questions
- Time limit: 90 minutes
- Passing score: 70%
- Prerequisites: None formally required
- Fee: $119 for virtual proctoring, $109 for an approved physical proctor
- Attempts: Up to three included with purchase - a 24-hour wait before attempt two, a two-week wait before attempt three
- Deadline: All attempts must be completed within 90 days of purchase
Remote testing has its own checklist: government-issued photo identification, a working webcam and microphone, a full room scan before the exam starts, and compatible proctoring software installed in advance. Chromebooks and tablets are not supported, so plan to test on a standard laptop or desktop. A non-phone calculator is allowed during the exam, which matters for domains involving electrical calculations.
Key Takeaway
Because the 90-day purchase-to-completion clock starts immediately, don't buy your exam attempt until your study plan is actually underway - treat the purchase as the start of a countdown, not a placeholder.
For a full cost comparison including what happens if you need extra attempts, read CAET Certification Cost 2026: Complete Pricing Breakdown. If you're unsure whether you qualify to sit for it at all, CAET Requirements 2026: Eligibility, Prerequisites & How to Qualify walks through the "no formal prerequisites" language in more detail.
The 8 CAET Domains Explained
The CAET exam draws its 100 questions from eight official topic areas. None of them are hands-on practical stations - every question is multiple-choice - but the content assumes familiarity with real shop tasks, terminology, and troubleshooting logic.
Domain 1: Maintenance Procedures & Regulatory Requirements
Covers documentation practices, maintenance record-keeping, and the regulatory framework technicians operate under.
- Understanding required paperwork after a repair or install
- Knowing where regulatory guidance intersects with daily shop work
Domain 2: Basic Electrical Theory & Systems
Foundational electrical concepts - voltage, current, resistance, circuits - applied to aircraft systems.
- Ohm's law and basic circuit analysis
- Reading and interpreting basic electrical diagrams
Domain 3: CNS - Communication, Navigation & Surveillance Systems
The avionics "black boxes" that let an aircraft talk, navigate, and be seen by ATC.
- Comm radios and transponders
- Navigation and surveillance system fundamentals
Domain 4: Flight Instrument & Pitot-Static Systems
How airspeed, altitude, and related instruments derive their readings from pressure sensing.
- Pitot-static system components and airflow
- Common instrument errors and troubleshooting logic
Domain 5: Digital Databus Systems
Modern avionics increasingly communicate over digital data buses rather than analog wiring alone.
- Recognizing databus architecture and signal basics
- Understanding how digital systems interface with legacy analog components
Domain 6: Aircraft Wiring, Hardware & Installation
The physical craft of avionics work - wire selection, connectors, hardware, and proper installation technique.
- Wire gauge, termination, and connector standards
- Installation best practices that affect long-term reliability
Domain 7: Tools, Test Equipment & Measurement Techniques
Knowing which tool or meter to reach for, and how to use it correctly and safely.
- Multimeters, signal generators, and other common test equipment
- Correct measurement technique to avoid false readings
Domain 8: Safety, Housekeeping & Best Practices
Shop safety culture, ESD precautions, and organizational habits that prevent damage and injury.
- Personal and equipment safety protocols
- Housekeeping standards that reduce error rates
For question-by-question breakdowns, sample scenarios, and a discussion of how heavily each domain is likely to be weighted, see CAET Exam Domains 2026: Complete Guide to All 8 Content Areas. If you want a condensed, single-page review once you've studied each domain individually, bookmark CAET Cheat Sheet 2026: One-Page Review of Must-Know Facts.
Who Pursues the CAET Credential
CAET is aimed at technicians entering or working in avionics installation and repair - the people who wire, install, troubleshoot, and maintain the CNS, instrument, and databus systems described above. Because there are no formal prerequisites, it functions as an accessible entry point for someone building credibility in avionics shops, MRO facilities, and general aviation maintenance operations, rather than a capstone credential reserved for veteran engineers.
If you're evaluating whether this certification lines up with the job titles and hiring patterns you're targeting, CAET Jobs covers the kinds of roles where the credential gets mentioned in postings or preferred-qualifications lists. Pairing that with CAET Salary Guide 2026: Complete Earnings Analysis gives a fuller picture of how the credential fits into a technician's career trajectory.
Keeping CAET Current: Recertification
CAET certification isn't permanent - it renews on a three-year cycle. To maintain it, credential holders complete 18 Continuing Education Hours (CEHs) within that cycle. Alternatively, earning an approved higher CAET credential or passing the online recertification exam also satisfies that cycle's renewal requirement.
Mapping a Study Timeline to the Domains
Because the exam pulls from eight distinct domains in a single 90-minute sitting, most candidates benefit from a structured, week-by-week approach rather than generic cramming. The key is sequencing: foundational domains first, systems-specific domains next, and practical/safety domains last so they're fresh on exam day.
Foundations
- Domain 2 (Basic Electrical Theory & Systems)
- Domain 1 (Maintenance Procedures & Regulatory Requirements)
Core Avionics Systems
- Domain 3 (CNS Systems)
- Domain 4 (Flight Instrument & Pitot-Static Systems)
Wiring and Digital Systems
- Domain 6 (Aircraft Wiring, Hardware & Installation)
- Domain 5 (Digital Databus Systems)
Tools, Safety, and Full Review
- Domain 7 (Tools, Test Equipment & Measurement Techniques)
- Domain 8 (Safety, Housekeeping & Best Practices)
- Timed practice runs under the 90-minute limit
This timeline is a starting framework, not a rigid rule - adjust the pacing based on which domains reflect your current shop experience versus unfamiliar territory. For a more detailed, attempt-by-attempt strategy including how to use your three included exam attempts wisely, see CAET Study Guide 2026: How to Pass on Your First Attempt.
Is the Effort Worth It?
Whether CAET is worth pursuing depends on where you are in your avionics career and what your local employers actually recognize. Because the exam is knowledge-based, affordably priced relative to many technical credentials, and requires no prerequisites, the barrier to entry is low compared to the potential value of having a documented, third-party-validated baseline of avionics knowledge on your resume.
Before committing the registration fee, it's worth reading an honest breakdown of the return on that investment: Is the CAET Certification Worth It? Complete ROI Analysis 2026. And if your main hesitation is around difficulty rather than cost, How Hard Is the CAET Exam? Complete Difficulty Guide 2026 and CAET Pass Rate 2026: What the Data Shows both address that question directly using only verified program data.
Once you've decided to move forward, you can start building familiarity with the question format using realistic practice questions on the main CAET practice test platform - working through sample items under timed conditions is one of the most direct ways to gauge readiness before you spend money on an official attempt. You can also revisit the practice test homepage anytime you want to reset your prep plan around a specific domain.
Frequently Asked Questions
CAET stands for Certified Aircraft Electronics Technician, a Level 1 credential from the Aircraft Electronics Association (AEA), delivered through the Unmanned Safety Institute.
The exam has 100 multiple-choice questions with a 90-minute time limit, and you need a 70% score to pass.
No. There are no formal prerequisites, which is part of why the credential works as an accessible entry point into avionics work.
Your purchase includes up to three attempts. You must wait 24 hours before a second attempt and two weeks before a third, and all attempts must be completed within 90 days of purchase.
CAET renews every three years. You can satisfy that cycle's requirement with 18 Continuing Education Hours (CEHs), an approved higher CAET credential, or the online recertification exam.