FAA A&P Written Test Pass Rates: What the Data Shows

The Reality of FAA A&P Written Test Pass Rates

Every aspiring A&P mechanic asks the same question: how hard are the written tests really? The honest answer is that the FAA knowledge tests are designed to be challenging — and the pass rates reflect that. While the FAA does not publish official, itemized pass rates for each individual knowledge test, data gathered from Part 147 schools, DMEs (Designated Mechanic Examiners), and candidate surveys reveals clear patterns about which tests are the toughest and where candidates tend to struggle most.

Understanding these statistics is not just about satisfying curiosity. Knowing which tests have the lowest pass rates allows you to allocate your study time strategically, focus your preparation efforts where they matter most, and avoid the common mistakes that cause first-time failures. This guide compiles the best available data on FAA A&P written test pass rates across all three tests — General, Airframe, and Powerplant — and provides actionable strategies to put the odds in your favor.

Estimated Pass Rates by Test

Based on data collected from FAA-approved Part 147 schools, aviation maintenance training programs, and online A&P candidate communities, the estimated first-attempt pass rates for the FAA written tests are as follows:

Note: These figures are estimates compiled from Part 147 school data, DME feedback, and candidate surveys. The FAA does not release official test-by-test pass rate data. Individual results vary by preparation method, background, and study effort.

Test-by-Test Breakdown

General Test (AM.I) — ~70–78% Pass Rate

The General test (60 questions, 2 hours) consistently shows the highest pass rate of the three FAA written tests. This is because the content — basic electricity, aircraft drawings, weight and balance, materials and processes, physics, and inspection fundamentals — is taught thoroughly in Part 147 programs and is broadly applicable to all maintenance work. Candidates who struggle with the General test usually do so because they underestimate it. The test covers an enormous breadth of topics, and candidates who focus too narrowly on one area (e.g., electricity) can miss marks in materials, drawings, or weight and balance. The key to success on the General test is systematic coverage of all AM.I subject areas.

Airframe Test (AM.II) — ~65–72% Pass Rate

The Airframe test (100 questions, 2 hours) tests knowledge of aircraft structures and systems: sheet metal and composite repair, hydraulic and pneumatic systems, landing gear, flight controls, fuel systems, cabin systems, and structural inspection. The moderate-to-high difficulty comes from the sheer breadth of the subject matter. Airframe technology varies enormously between aircraft types — a small general aviation aircraft has very different systems than a large transport-category jet — and the test covers general airframe knowledge applicable to both. Weakness in hydraulic systems, flight control rigging, and landing gear is a common failure pattern.

Powerplant Test (AM.III) — ~60–68% Pass Rate

The Powerplant test (100 questions, 2 hours) is widely regarded as the hardest of the three FAA written tests, with the lowest estimated first-attempt pass rate. The exam covers reciprocating and turbine engine theory, fuel metering, ignition and starting systems, lubrication, propellers, and engine instrument systems. The challenge is the depth of technical detail required — you need to understand not just how an engine works, but specific tolerances, inspection intervals, and troubleshooting procedures. Turbine engine questions are particularly difficult for candidates who trained primarily on reciprocating engines, and vice versa. Successful candidates report spending 40–50% more study time on the Powerplant test than on the General test.

Why Do Candidates Fail? Common Failure Patterns

Understanding why candidates fail is just as important as knowing what to study. Across all three tests, several recurring failure patterns emerge:

• Underestimating question depth — Many candidates assume the FAA tests surface-level knowledge. In reality, questions often require applying multiple concepts to a single scenario. A typical Powerplant question might ask you to determine the most likely cause of an engine condition using knowledge of fuel, ignition, and indicating systems together.
• Insufficient practice volume — Candidates who attempt fewer than 300 practice questions per test before their test date have significantly higher failure rates, according to Part 147 program data. The Powerplant test typically requires the most practice.
• Poor time management — Each test has a strict time limit (2 hours: 60 questions for General, 100 for Airframe and Powerplant). Candidates who spend too long on difficult questions early in the test often run out of time for questions they could have answered correctly later.
• Overconfidence in known topics — Candidates who work professionally in one area (e.g., a mechanic specializing in engines) sometimes assume the Powerplant test will be easy — and then fail because the test covers topics outside their day-to-day experience.
• Ignoring the ACS and FAA handbooks — The Aviation Mechanic Airman Certification Standards and the FAA handbooks (FAA-H-8083-30B, -31B, -32B) define exactly which subject areas are covered in each test. Candidates who study from generic or outdated materials rather than aligning their preparation with the ACS often miss entire topic areas.
• Not using adaptive practice tools — Traditional study methods (reading textbooks, reviewing notes) are passive. Active practice with adaptive difficulty that targets your weak areas is significantly more effective for exam preparation.

How Test Difficulty Affects Certification Timelines

The pass rates directly impact how long it takes to complete all three tests. The FAA allows you to take the tests in any order, and most candidates complete all three within 3 to 9 months. However, candidates who fail one or more tests on their first attempt can face significant delays because of the 30-day waiting period before retaking a failed test under 14 CFR Part 65. In practice, failing even one test can add 1–3 months to your certification timeline depending on testing center availability.

The most efficient strategy is to attempt the hardest tests (Powerplant, then Airframe) when you are most prepared and have the most study time available. Many successful candidates take the General test first as a confidence builder, then schedule the harder tests with more preparation behind them. For a complete guide to structuring your study schedule, see our FAA A&P exam structure guide.

Tips to Beat the Averages

While the statistics may seem daunting, thousands of candidates pass these tests every year. Here is what the most successful candidates do differently:

• Start early and study consistently — Cramming is the number one cause of failure. The human brain learns best through spaced repetition — studying for 45–60 minutes daily over 6–12 weeks is far more effective than 6-hour sessions on weekends. Sky License's AI-powered platform uses spaced repetition algorithms to optimize your study schedule automatically.
• Use adaptive difficulty practice — Instead of studying linearly, start with easier questions to build foundational knowledge and let the system progressively challenge you with harder questions as your confidence grows. This approach, used by Sky License, ensures you are always studying at the edge of your ability — the zone where learning is most efficient.
• Simulate real test conditions — Before your test date, complete at least 3–5 full-length timed practice tests (60 questions/2h for General, 100 questions/2h for Airframe and Powerplant). This builds test-day stamina, teaches you to manage time under pressure, and reveals which question formats you find most challenging.
• Analyze your mistakes — Every wrong answer is a learning opportunity. The most effective candidates spend as much time reviewing their mistakes as they do answering new questions. Detailed answer explanations that explain not just why the correct answer is right, but why each wrong option is wrong, accelerate this learning process dramatically.
• Focus on your weakest test first — If pass rate data shows Powerplant is the toughest test, do not save it for last. Tackle your hardest test when your motivation and study momentum are highest. The confidence boost from passing a hard test will carry you through the rest.
• Join a community of candidates — Studying in isolation is harder than studying with peers. Engaging with other A&P candidates through forums, study groups, or social media communities helps you discover new perspectives, clarify confusing topics, and stay motivated.

How Sky License Improves Your Chances

Sky License was built specifically for the FAA A&P written tests. Unlike generic quiz apps or outdated question banks, Sky License's AI-powered platform is tailored to the Aviation Mechanic ACS and the FAA test question bank structure. Here is how it helps you beat the averages:

• AI-powered adaptive difficulty — The platform continuously assesses your performance and adjusts question difficulty in real-time. If you are strong on electrical theory but weak on fuel systems, you will see more fuel system questions until you reach mastery.
• ACS-aligned question bank — Every question maps directly to a specific subject area in the FAA's Aviation Mechanic ACS (AM.I, AM.II, AM.III). You can track your coverage progress and identify gaps immediately.
• Detailed explanations — Each question includes a thorough explanation of why each answer option is correct or incorrect, with references to the FAA handbooks and AC 43.13-1B, turning every practice session into a learning session.
• Performance analytics — See your pass rate by test, by subject area, and by question type. Identify exactly where you need more practice at a glance.
• Timed practice tests — Simulate the real test experience with adjustable time limits and question counts that match the actual FAA format.

Start your FAA A&P test preparation with Sky License →

Frequently Asked Questions

Does the FAA publish official pass rates?

No, the FAA does not publicly release itemized pass rate data for individual A&P knowledge tests. The figures cited in this article are estimates compiled from Part 147 school data, DME feedback, and candidate surveys. For official information about the tests themselves, consult the FAA's Aviation Mechanic ACS and the FAA handbooks.

Which FAA A&P test has the lowest pass rate?

Based on available data, the Powerplant test has the lowest estimated first-attempt pass rate at approximately 60–68%. The Airframe test follows at 65–72%, and the General test has the highest pass rate at approximately 70–78%.

Can I retake a failed FAA test immediately?

No. Under 14 CFR Part 65, you must wait at least 30 days before retaking a failed knowledge test. This is to ensure candidates have adequate time to re-study and prepare before making another attempt. Use this time wisely — analyze your results, identify weak areas, and focus your practice on those specific subject areas.

How many practice questions should I do per test?

Most successful candidates report completing 300–500 practice questions per test before their test date. For the harder tests (Powerplant, Airframe), many candidates do 500–700 questions. The quality of practice matters as much as quantity — ensure you are reviewing explanations for every question, not just counting reps.

For a more detailed look at each test's structure, question format, and preparation requirements, visit our FAA A&P exam structure guide or explore our recommended study resources.