- ACE-AO Overview: What You're Actually Being Tested On
- The 14 Core Content Areas of the ACE-AO Exam
- Exam Format, Scoring, and What "70%" Really Means
- Registration, Fees, and What's Included
- Who Hires ACE-AO Holders
- Mapping a Study Plan to the Content Areas
- Enrollment Options Compared
- Frequently Asked Questions
- ACE-AO covers 14 Part 139-based content areas, from the Airport Certification Manual to Subpart E safety management systems.
- The exam is 100 multiple-choice questions in 120 minutes, and you need 70 correct answers to pass.
- Standard enrollment is $555 ($395 for students), covering electronic study modules and one exam attempt.
- AAAE recommends at least 90 days of preparation before sitting for a closed-book, remote-proctored exam via TopClass.
ACE-AO Overview: What You're Actually Being Tested On
The Airport Certified Employee - Airfield Operations (ACE-AO) credential, administered by the American Association of Airport Executives (AAAE), is built directly around 14 U.S. FAR Part 139 regulatory topics. That means the exam isn't testing generic airport trivia - it's testing whether you understand the specific operational, safety, and compliance responsibilities that keep a certificated airfield legally operating. If you've ever wondered what is ACE-AO or seen the credential referenced without context, this is the short version: it's a Part 139-focused certification for people who work in or around airfield operations, not a generalist airport management credential.
This guide breaks down every content area you'll be tested on, explains how the exam is structured, and shows how the registration mechanics affect your prep timeline. For a deeper dive into pass/fail mechanics specifically, see ACE-AO Passing Score 2026.
The 14 Core Content Areas of the ACE-AO Exam
Based on the official Part 139-based curriculum, candidates should expect exam content drawn from the following areas. Treat each one as a study unit rather than a single question type - most of these topics generate multiple questions across the 100-question exam.
Airport Certification Manual (ACM)
The ACM is the operating document every Part 139 airport must maintain. Expect questions on what the ACM contains, how it's used, and how it relates to airport-specific procedures.
- Purpose and structure of the ACM
- How ACM content ties to daily operational decisions
Records and Personnel
Covers recordkeeping requirements and personnel qualifications tied to Part 139 compliance - who documents what, and why records matter during FAA inspections.
- Recordkeeping obligations
- Personnel training and qualification documentation
Self-Inspections
Self-inspection programs are a core airfield operations duty. Know inspection frequency logic, what triggers an inspection, and how findings get documented and escalated.
- Routine vs. triggered self-inspections
- Documentation and follow-up procedures
Airfield Surfaces, Markings, Signs, and Lighting
A heavily tested area covering pavement condition, runway/taxiway markings, signage standards, and lighting systems that keep aircraft moving safely.
- Pavement condition indicators
- Standard marking, sign, and lighting configurations
Snow and Ice Control
Winter operations planning, including how airports prioritize clearing, report surface conditions, and coordinate with air traffic during snow events.
- Snow removal prioritization
- Coordination during winter weather operations
Aircraft Rescue and Firefighting (ARFF)
ARFF response requirements, index-based staffing and equipment expectations, and how ARFF integrates with overall airfield emergency response.
- ARFF index concepts
- Response time and readiness expectations
Hazardous Materials
Identification, handling, and reporting expectations for hazardous materials on the airfield.
- Recognizing hazmat situations
- Reporting and containment basics
Emergency Planning
Airport Emergency Plan (AEP) structure and how operations personnel execute their role during an emergency.
- AEP components
- Roles during activation
Pedestrians and Vehicles
Movement area access control, driver training expectations, and vehicle/pedestrian deconfliction on active airfields.
- Movement area access rules
- Escort and driving privilege basics
Wildlife Hazards
Wildlife hazard management plans and the operational steps taken to reduce wildlife strike risk.
- Wildlife hazard assessment triggers
- Mitigation techniques
Obstructions and Construction
Obstruction identification and how construction activity near or on the airfield is planned, permitted, and monitored for safety.
- Obstruction evaluation basics
- Construction safety and phasing coordination
Airport Condition Reporting
How airfield conditions get communicated - a critical, practical skill for anyone in an operations role.
- Condition reporting formats and timing
- Who receives and acts on reports
Airport Safety Management Systems (SMS) Under Subpart E
SMS concepts as they apply to Part 139 airports, including how safety risk is identified and managed at a programmatic level.
- SMS pillars and purpose
- How Subpart E requirements are applied
Because these content areas mirror the regulation itself, many candidates find that reading Part 139 alongside a structured resource works better than memorizing isolated facts. For a consolidated review resource, see the ACE-AO Cheat Sheet, and for a full study approach across all content areas, check the ACE-AO Study Guide.
Exam Format, Scoring, and What "70%" Really Means
The ACE-AO exam is 100 multiple-choice questions, delivered in a 120-minute window. To pass, you need 70 correct answers - a straightforward, fixed threshold with no curve or scaled scoring. That simplicity is useful for planning: you know exactly what target you're studying toward.
The exam is closed-book and administered through AAAE's TopClass platform using recorded remote proctoring. You'll need a working computer, webcam, microphone, and a government-issued photo ID to check in. There's no option to bring notes, reference the Part 139 text, or consult outside materials during the test - everything you need has to be internalized beforehand.
Key Takeaway
Because it's closed-book, don't just recognize correct answers when you see them - practice recalling terminology and procedures from memory, especially for the more mechanical topics like signage and lighting configurations.
If a first attempt doesn't go your way, the retake fee is $75, and self-study remains the primary preparation path - there's no mandatory classroom component. AAAE recommends at least 90 days of preparation, and your exam must be completed within 26 months of enrollment. For a full breakdown of how tough the exam actually is relative to that scoring threshold, read How Hard Is the ACE-AO Exam? and ACE-AO Pass Rate 2026.
Registration, Fees, and What's Included
Standard enrollment for ACE-AO is $555, whether you're an AAAE member or not - membership is optional and doesn't discount the exam fee. Full-time students qualify for a reduced $395 rate, provided they submit a current course schedule at the time of registration.
Enrollment includes electronic study modules and one exam attempt. It does not include printed materials or formal review courses, both of which cost extra if you want them. There's also an optional official Blank Slate ACE Operations flashcard app, priced at $150 for 90 days of access, for candidates who want an additional active-recall study tool layered on top of the included modules.
For the complete pricing picture, including how these numbers stack up against other professional certifications in the airport industry, see ACE-AO Certification Cost 2026. If you're still confirming eligibility before you register, review ACE-AO Requirements 2026 first.
Who Hires ACE-AO Holders
ACE-AO is aimed squarely at people working in, or aiming to move into, airfield operations roles at Part 139-certificated airports - operations agents, airfield safety coordinators, and supervisors who need to demonstrate fluency in the regulatory content covered above. The credential signals that you understand self-inspection protocols, condition reporting, wildlife hazard management, and the other operational duties airports are legally required to perform.
If you're evaluating whether this certification fits your career path, ACE-AO Jobs covers the roles where this credential tends to matter, and ACE-AO Salary Guide 2026 looks at how certification factors into compensation conversations. For a broader cost-benefit view, Is the ACE-AO Certification Worth It? walks through the full ROI picture.
Mapping a Study Plan to the Content Areas
With 14 content areas and a fixed 90-day minimum preparation window recommended by AAAE, the most efficient approach is to sequence your study around related topic clusters rather than studying alphabetically or randomly. Group regulatory/administrative topics together, then move to physical airfield topics, then emergency/safety topics, and finish with a full-length practice review.
Foundations
- Airport Certification Manual structure
- Records and personnel requirements
- Self-inspection procedures
Physical Airfield Systems
- Airfield surfaces, markings, signs, and lighting
- Snow and ice control
- Obstructions and construction
Safety and Emergency Response
- ARFF concepts
- Hazardous materials
- Emergency planning
- Wildlife hazards
Operational Communication and SMS
- Pedestrians and vehicles
- Airport condition reporting
- Safety management systems under Subpart E
Review and Practice
- Full-length timed practice tests
- Targeted review of weak content areas
- Final closed-book recall drills
This sequencing respects the 90-day recommended minimum while leaving buffer time before your exam window. Since you have up to 26 months from enrollment, there's no need to rush - but momentum matters, so avoid long gaps between study sessions. If you want a ready-made version of this kind of plan with more detail on daily study techniques, the ACE-AO Study Guide expands on this timeline. You can also reinforce recall for each content area using timed practice questions on our practice test platform.
Enrollment Options Compared
| Option | Cost | What's Included |
|---|---|---|
| Standard Enrollment | $555 | Electronic study modules, one exam attempt |
| Student Enrollment | $395 | Electronic study modules, one exam attempt (requires current course schedule at registration) |
| Failed Exam Retake | $75 | One additional exam attempt |
| Blank Slate Flashcard App (Optional) | $150 | 90 days of app access for supplemental review |
Notice that printed materials and formal review courses are not bundled into any tier - they're add-ons if you choose to purchase them separately. Many candidates instead supplement their electronic modules with independent practice questions through a dedicated practice test resource rather than paying for additional printed materials.
Frequently Asked Questions
The curriculum is organized around 14 Part 139-based content areas, ranging from the Airport Certification Manual to airport safety management systems under Subpart E.
No. The exam is closed-book and delivered through TopClass with recorded remote proctoring, requiring a webcam, microphone, and government-issued photo ID.
You must complete the exam within 26 months of enrollment, though AAAE recommends at least 90 days of preparation before sitting for it.
You can retake it for a $75 fee. Enrollment only includes one initial exam attempt, so budget for a potential retake.
No. Enrollment covers electronic study modules and one exam attempt only; printed materials and review courses are purchased separately.
Understanding the full scope of the 14 content areas - and how they map directly to Part 139 responsibilities - is the single biggest advantage you can build before exam day. Pair that content knowledge with structured, timed practice, and the 120-minute, 100-question format becomes far more manageable.