FAA ACS: Airman Certification Standards Complete Test Guide

The FAA Airman Certification Standards (ACS) is the single document that defines what you must know, consider, and demonstrate to earn an FAA pilot certificate or rating. Replacing the older Practical Test Standards (PTS) starting in 2016, the ACS integrates three layers into one framework — knowledge, risk management, and skills — so that examiners evaluate the whole pilot, not just the maneuvers.

If you are studying for a Private Pilot, Instrument, Commercial, ATP, or CFI checkride, the ACS for your certificate is the most important document on your desk after the regulations themselves. The FAA publishes every ACS as a free PDF on faa.gov, and current revision letters drift forward as the agency updates content (the Private Pilot ACS is on revision FAA-S-ACS-6C as of 2024, for example).

Most candidates discover the ACS the hard way — usually a week before the checkride, when their instructor hands them a printed copy and says "read this cover to cover." That works, but it sells the document short. The ACS is structured so that you can study from it from your very first ground school lesson.

Each Area of Operation lists the knowledge elements, risk management considerations, and skill standards an applicant must meet, with clear codes that map directly to the Knowledge Test Report you receive after passing the written. Treating the ACS as a syllabus rather than a last-minute reference makes the entire checkride preparation cycle calmer and more focused.

This guide walks through what the ACS is, why the FAA replaced the PTS with it, how the three-part structure works, which ACS documents are currently published, how examiners use the ACS on checkrides, where to download free copies, and how to study the standards efficiently before your practical test. By the end, you should be able to flip to any Area of Operation in your ACS, read the codes, and know exactly what an examiner expects to see.

The transition from PTS to ACS started with the Private Pilot Airplane Single-Engine Land in June 2016. The Instrument Rating Airplane ACS published the same day. The FAA had been refining the concept for several years through industry working groups, and the rollout has continued steadily — Commercial Pilot Airplane in 2017, ATP Airplane in 2019, CFI in 2024, and so on.

The PTS is not entirely gone. A handful of older ratings — glider, lighter-than-air, rotorcraft helicopter (for some certificates) — still use PTS while their ACS conversions are in progress. But for the certificates most candidates pursue, the ACS is the current standard, and PTS documents for converted ratings are obsolete.

So what exactly is the difference between the old PTS and the new ACS? On the surface, both documents tell an applicant and an examiner what the practical test will cover. Both are organized into Areas of Operation (preflight, takeoffs and landings, navigation, emergency operations, postflight). Both specify tolerances — heading plus or minus 10 degrees, altitude plus or minus 100 feet, airspeed plus or minus 10 knots.

The difference is what the ACS adds on top of the skill tolerances. Each task in the ACS now lists Knowledge elements, Risk Management considerations, and Skills standards. The examiner is required to evaluate all three layers during the practical test, not just the maneuver tolerances.

Why the change? In the FAA's words, accident analysis kept showing that pilots possessed the technical skill to handle situations but failed to apply judgment, manage risk, or call on the right piece of knowledge at the right time. The Federal Aviation Administration concluded that a testing standard focused only on stick-and-rudder tolerances was missing the safety-critical mental work that distinguishes a competent pilot from a marginal one.

The ACS embeds that mental work — knowledge and risk management — into every task, alongside the skills. The result is a more demanding testing standard, but also one that more accurately reflects what real-world piloting requires.

Every ACS task is built around the same three-part structure, and once you understand the structure you can navigate any ACS document quickly. The first part is the Knowledge section, which lists the specific topics the applicant must understand for that task. These are typically pulled from the Pilot's Handbook of Aeronautical Knowledge, the Airplane Flying Handbook, the AIM, and the relevant regulations.

The second part is Risk Management, which lists the specific hazards and decision points the applicant must be able to identify and mitigate for that task. The third part is Skills, which lists the maneuvers the applicant must execute within stated tolerances. An examiner will sample knowledge and risk management orally before the flight (or during ground portions of integrated checkrides) and evaluate skills in flight.

The codes you see throughout the ACS — like PA.I.A.K1 or CA.VI.B.R3 — are not random. They are structured identifiers that tell you the certificate, Area of Operation, Task, element type (K for Knowledge, R for Risk Management, S for Skills), and element number.

PA.I.A.K1, for example, means Private Pilot Airplane, Area of Operation I (Preflight Preparation), Task A (Pilot Qualifications), Knowledge element 1. When you fail a question on the written exam, your Knowledge Test Report lists the ACS codes for the topics you missed, and the examiner is required by the FAA to retest those specific codes during the oral portion of the checkride. This is a critical detail many candidates miss until checkride day: if you scored 75% on the written with three questions wrong in airspace, expect to spend extra time on airspace during the oral.

That direct link between the written exam and the oral exam is the single biggest reason to study from the ACS rather than from a generic checkride prep book. The codes on your Knowledge Test Report are not suggestions — they are a roadmap to where the examiner will dig deeper.

Some applicants finish the written, throw the report in a drawer, and then are surprised when the examiner pulls up exactly those topics during the oral. Save the report. Look up each code in your ACS. Study those specific elements until you can discuss them confidently. The examiner does not have discretion to skip them.

Below is a quick rundown of which ACS documents are currently published and active. The FAA's training website maintains the master list, but it helps to know what exists. Private Pilot Airplane (FAA-S-ACS-6C), Instrument Rating Airplane (FAA-S-ACS-8B), Commercial Pilot Airplane (FAA-S-ACS-7B), Airline Transport Pilot Airplane (FAA-S-ACS-11A), and the CFI ACS (FAA-S-ACS-25) are the airplane-side core documents.

There are also rotorcraft helicopter ACS for some certificates, a Powered-Lift ACS for the new generation of eVTOL aircraft, a Sport Pilot ACS, and a Remote Pilot ACS for Part 107 drone certification. Some specialty areas — glider and balloon, for instance — still use PTS documents while their ACS conversions are in progress.

When you walk into a checkride, the examiner has a copy of the ACS open in front of them. They are not improvising. The examiner is required to evaluate every Area of Operation listed in the ACS for your certificate, and they will sample tasks from each one.

The oral portion of the checkride typically lasts 90 minutes to 2.5 hours and covers Areas of Operation I and II (Preflight Preparation and Preflight Procedures) along with knowledge and risk management elements from later areas that will appear in flight. The flight portion lasts another 1.5 to 2.5 hours and covers takeoffs, climbs, cruise procedures, navigation, slow flight and stalls, emergencies, ground reference maneuvers (for Private), and landings.

The examiner's job is not to trick you. The examiner's job is to verify that you meet the standards in the ACS, which means they will ask you about elements you should already know and watch you fly maneuvers you should already have practiced. The single biggest predictor of a successful checkride is the candidate being able to anticipate which tasks will be evaluated and how.

The ACS gives you that anticipation for free — read it, know it, and there are no surprises on test day. Candidates who fail tend to fail because they were unfamiliar with the document, not because they were incapable of meeting the standard.

Downloading the ACS is straightforward. Go to faa.gov, search for "Airman Certification Standards," and you will find a page listing every current ACS as a free PDF. Click the link for your certificate (Private Pilot Airplane, Instrument Rating Airplane, Commercial, etc.) and you get the current revision in PDF format.

Some flight schools also distribute printed copies, and third-party publishers like ASA reproduce the ACS with extra commentary for around $15–$25. The official PDF on faa.gov is identical in content to the print versions, so unless you specifically want a marked-up or annotated edition, the free PDF is all you need.

One practical study tip that pays off: open your ACS in a tabbed PDF reader and bookmark each Area of Operation. Print a hard copy if you like to annotate, but keep a digital copy on your tablet or phone so you can pull it up during ground sessions with your instructor.

The ACS is short enough — most certificates are 80–120 pages — that you can flip through any task in under a minute. Knowing where things are inside the document is half the battle. The other half is being able to discuss the knowledge and risk management elements in your own words, not by reciting the bullet points back at the examiner.

A common pitfall: candidates memorize the Skills tolerances (heading plus or minus 10, altitude plus or minus 100) and ignore the Knowledge and Risk Management columns until the week of the checkride. This is backwards. The Skills tolerances are something you build through hours of dual instruction with your CFI — they cannot be crammed.

The Knowledge and Risk Management elements are exactly what you can study from a book, and they are also where most checkride questions actually come from. Allocate your study time accordingly: spend most of it reading the ACS, the PHAK, the AIM, and the FAR while you are sleeping at night and waiting for weather, and use your in-aircraft time to lock down the Skills tolerances under your instructor's eye.

Another pitfall is treating the ACS as a static document. Revisions happen. Bookmark the FAA's ACS landing page and check the revision letter on the front cover of your copy at least once a quarter. The change list inside each new revision shows what was added, removed, or rewritten — sometimes minor wording changes, sometimes substantial restructuring of an Area of Operation.

Your CFI will usually flag major revisions, but the final responsibility for studying the current standard sits with you. An examiner checks the cover page of your ACS to confirm you have the current edition before they begin the oral.

The integration of risk management into every task is the part of the ACS that confuses new candidates the most. What does an examiner actually expect when they ask about risk management?

The answer is application of a structured decision framework — usually the PAVE checklist (Pilot, Aircraft, enVironment, External pressures), the IMSAFE personal minimums check, or the 5P model (Plan, Plane, Pilot, Passengers, Programming). For each task in the ACS, the Risk Management column lists specific hazards relevant to that task — for short-field landings, that might include obstacle clearance, runway condition, wind, and rejection criteria. The examiner expects you to walk through those hazards using one of the FAA's frameworks rather than rattling them off as a list.

Once you've internalized the ACS structure, working through Areas of Operation becomes a tractable study project. Take Area I (Preflight Preparation) for the Private Pilot ACS. The tasks include Pilot Qualifications, Airworthiness Requirements, Weather Information, Cross-Country Flight Planning, National Airspace System, Performance and Limitations, Operation of Systems, Human Factors, and Water and Seaplane Characteristics.

Each task has its three columns. Spend a study session on each task: read the Knowledge elements, look up the references (PHAK chapter numbers and AIM sections are listed), then walk through the Risk Management considerations using a framework. By the time you finish Area I, you have systematically covered everything an examiner could ask about preflight planning.

The ACS does not exist in isolation. It is part of a larger family of FAA testing and training documents. The Aeronautical Information Manual (AIM) provides procedural guidance the ACS references constantly. The Pilot's Handbook of Aeronautical Knowledge (PHAK) is the theory source for most Knowledge elements. The Airplane Flying Handbook (AFH) covers the technique behind every Skill standard.

The Federal Aviation Regulations (14 CFR Parts 61, 91, and 141) supply the legal framework. And the Knowledge Test Question Bank — referenced indirectly through the ACS codes — generates the written exam questions. All of these documents are free on faa.gov, and all of them are connected through the ACS code system. Knowing how to navigate between them is the difference between a confident applicant and an anxious one.

One final note on the ACS that often gets glossed over: it is a living document, not a final word. The FAA publishes revisions when accident analysis, technology changes, or industry feedback shows that the standards need updating. The Private Pilot ACS has been through revisions A, B, and C since 2016. Each revision tweaks language, adds new risk management considerations, and occasionally adjusts skill tolerances.

If you started ground school with the B revision and your checkride is six months out, check whether revision C has been published in the meantime — your examiner will. Staying current is not optional. The FAA expects applicants to test under the current ACS revision in effect at the time of the practical test.

Learning the ACS standards before your checkride pays dividends in two ways. First, you walk into the practical test knowing exactly what will be evaluated, which reduces anxiety. Second, you internalize a structured framework — knowledge plus risk management plus skills — that follows you through instrument, commercial, ATP, and CFI training. Master it once at the Private Pilot level and it scales.

A reasonable study plan: eight weeks out, read every Area of Operation once. Six weeks out, match each Knowledge element to the relevant PHAK chapter and AIM section. Four weeks out, start mock orals with your CFI using the ACS as the script. Two weeks out, drill Risk Management columns using PAVE or 5P. One week out, review your Knowledge Test Report codes and prepare specific answers. The day before, sleep — do not cram.

The ACS turns the previously opaque checkride process into a transparent, structured evaluation. Free, current, authoritative, and directly linked to the written exam through the code system, it is the single most efficient study document the FAA publishes. Download the current PDF for your certificate from faa.gov today and start matching elements to the rest of your training materials.