ADX Exam Registration Process: Step-by-Step Guide 2026

What Is the Aircraft Dispatcher Knowledge Test?

The Aircraft Dispatcher Knowledge Test - commonly called the ADX - is the FAA-required written examination that candidates must pass before sitting for the oral and practical evaluation administered by a Designated Pilot Examiner (DPE). The test is not a general aviation trivia quiz. It is a rigorous, operationally focused assessment built around the actual duties a certificated aircraft dispatcher performs every day at a Part 121 airline: releasing flights, monitoring weather, calculating performance, coordinating with crews in the air, and taking command-level action during emergencies.

Airlines - both major carriers and regional operators - hire dispatchers to share legal responsibility for every IFR flight with the captain. That shared authority model is unique to U.S. aviation law, and the ADX test is designed to prove a candidate understands it at a working level, not just a conceptual one. If you are preparing for this career path, understanding the registration process in full eliminates one major source of confusion before test day arrives.

Eligibility Requirements Before You Register

Before you log in to an FAA testing provider and pay a fee, confirm you meet the eligibility baseline. The FAA requires that an ADX candidate be at least 21 years old and hold, at minimum, a third-class medical certificate - though some dispatch training programs and employers have their own additional prerequisites.

More practically, you need a written test authorization or an endorsement that establishes your eligibility. Most candidates obtain this one of two ways:

• Graduation from an FAA-approved aircraft dispatcher course: These Part 65 Appendix A courses are offered by aviation universities, community colleges, and dedicated dispatch schools. Completing the course generates an official graduation record that serves as your test eligibility document.
• Experience pathway: Candidates who can demonstrate at least one year of experience as a pilot, navigator, or meteorologist in air transportation, or two years performing duties equivalent to those of a dispatcher, may qualify through the experience route. This path requires documentation and should be confirmed directly with the FAA Flight Standards District Office (FSDO).

Either way, have your eligibility documentation ready before you attempt to schedule. Testing centers will ask for it, and showing up without it wastes your registration fee.

Step-by-Step ADX Registration Walkthrough

Step 1 - Create or Log In to Your PSI or CATS Account

The FAA authorizes specific computer-based testing vendors to administer the ADX. PSI Services and CATS (Computer Assisted Testing Service) are the two primary providers. If you have taken any FAA knowledge test before, you likely already have an account with one of them. If not, navigate to their official website and create a new profile. Use your full legal name exactly as it appears on your government-issued ID - discrepancies cause delays at the test center.

Step 2 - Select the Correct Test Code

The ADX knowledge test has its own FAA test code. On the scheduling platform, search for "ADX" or "Aircraft Dispatcher." Do not confuse it with the ATP written test or any instrument-related knowledge exam. Selecting the wrong test means your score cannot be applied to your dispatcher certificate application.

Step 3 - Submit Eligibility Documentation

During the online scheduling process, you will be asked to confirm your eligibility pathway. For course graduates, this typically means entering your school's authorization code or uploading a scanned copy of your graduation certificate. For the experience pathway, you may need to coordinate with an FSDO beforehand to receive a written authorization letter. Keep a digital and physical copy of every eligibility document.

Step 4 - Pay the Testing Fee

Testing fees are paid directly to the testing vendor at the time of scheduling. Fees are subject to change and are set by the vendor, not the FAA, so always verify the current amount on the testing provider's official site before budgeting. Credit and debit cards are typically accepted. Note that the fee is generally non-refundable if you cancel within a short window before your appointment.

Step 5 - Choose Your Test Center and Date

Both PSI and CATS operate nationwide networks of testing centers. Select a location convenient to you and pick a date that gives you adequate preparation time. Most serious candidates schedule at least two to three weeks out - enough runway to complete domain-specific review and run timed practice tests. Seats at popular metropolitan centers fill up, so avoid last-minute scheduling.

Step 6 - Confirm Your Appointment

After completing the booking, you will receive a confirmation email. Print or save it. The confirmation contains your appointment time, test center address, acceptable ID list, and any specific instructions from the testing vendor. Read it fully - some test centers have strict arrival windows (typically 15-30 minutes before your scheduled start) and will turn away candidates who arrive late.

What the ADX Actually Covers: All Six Domains

The ADX is organized into six operational domains. Every question on the test maps to one of them. Understanding the domain structure is not just academic - it tells you exactly where to concentrate your study hours and where gaps in your knowledge are most likely to hurt you on test day.

For deeper preparation across all six domains, the resources listed in our guide to ADX Study Materials 2026: Best Books and Resources will point you toward the most domain-relevant materials available.

ADX Question Format and What to Expect

The ADX uses the standard FAA multiple-choice format: each question presents a scenario or a regulatory statement followed by three answer choices. There is one correct answer; the other two are plausible distractors drawn from adjacent regulatory sections or common operational misconceptions.

The test is computer-based. You will answer questions on a monitor at your assigned workstation with no access to personal notes or mobile devices. The FAA does permit the use of specific reference materials - notably the FAA-approved flight computer - for certain calculation-based questions, though not all questions require it.

Questions are not grouped by domain during the actual test - they are delivered in a randomized order. That is precisely why practicing with a tool that mirrors this structure matters. ADX Exam Prep's practice tests replicate the randomized, multiple-choice format so you are never surprised by pacing or question style on the actual exam day.

Scheduling Your Test Date Strategically

The date you choose matters more than most candidates realize. Scheduling too soon creates unnecessary pressure; scheduling too far out can lead to knowledge decay in the earlier domains while you are still studying the later ones.

A practical target: set your test date once you have completed an initial pass through all six domains and have run at least two full-length timed practice exams with scores comfortably above the passing threshold. That gap between your practice scores and the passing mark is your actual safety buffer on test day.

Consider also the time of day. Some candidates perform better in morning sessions before mental fatigue sets in; others need time to warm up. Most testing centers offer morning and afternoon slots - choose whatever matches your natural cognitive peak.

A Domain-by-Domain Prep Timeline

The following timeline is built specifically around the ADX's six domains. It is not a generic study schedule - each week maps to the operational logic of the actual exam. Domains 1 and 2 are front-loaded because understanding the dispatch release provides the foundational context for everything that follows.

Test Day Logistics and What to Bring

Arrive at the testing center at least 15 minutes before your scheduled appointment. Most centers will not admit you if you arrive after your designated check-in window has closed, and a no-show typically forfeits your fee.

Bring the following:

• Primary government-issued photo ID: A U.S. passport, state driver's license, or military ID - the name must match your registration exactly.
• Secondary ID: A credit card, student ID, or other document with your name.
• Your eligibility documentation: Printed or digital copy of your graduation certificate or FSDO authorization letter.
• FAA-approved flight computer (E6B): Bring it even if you are uncertain you will need it. The mechanical E6B is widely accepted; confirm whether your electronic equivalent is permitted by checking the testing vendor's current approved-materials list before your appointment.

Leave everything else in your car. Personal notes, textbooks, phones, and smart watches are prohibited in the testing room. The center will provide scratch paper or a whiteboard for calculations.

After the Test: Score Reports and Next Steps

Your score report is generated immediately at the end of the exam. The testing center will print it for you. The report shows your total score as well as a breakdown by domain - this is valuable information regardless of whether you pass or need to retake.

If you pass, your score report is valid for 24 calendar months. You must complete the oral and practical examination with an FAA-designated examiner within that window, or you will need to retake the knowledge test. Do not let the report expire by treating it as the finish line - the knowledge test is a prerequisite, not the credential itself.

If your score falls short, the domain breakdown tells you exactly where to focus. Candidates who fail Domain 6 (Abnormal and Emergency Procedures) often did so because they underweighted emergency communication protocols and NTSB notification chains. A targeted second preparation using the best ADX study materials available for those specific domains typically resolves the gap.

For a full walkthrough of what the registration process looks like from beginning to end in one place, you can always return to this ADX Exam Registration Process: Step-by-Step Guide 2026 as your reference document.

Frequently Asked Questions