- ACE-ALM stands for Airport Certified Employee - Airfield Lighting Maintenance, issued by AAAE.
- The exam is 100 multiple-choice questions in 120 minutes, with a passing score of 70%.
- Standard enrollment is $555; a $395 student rate applies with a current course schedule at registration.
- Enrollment includes electronic study modules and one exam attempt; a failed retake costs $75.
What Is a ACE-ALM?
ACE-ALM stands for Airport Certified Employee - Airfield Lighting Maintenance. It is a specialty designation within the broader Airport Certified Employee (ACE) program administered by the American Association of Airport Executives (AAAE). The "ALM" suffix distinguishes this track from other ACE specialties by focusing narrowly on the systems that keep runway, taxiway, and approach lighting operating safely: circuits, regulators, fixtures, signs, and the electrical infrastructure behind them.
If you've landed here trying to sort fact from noise, you're not alone - the acronym ACE-ALM is sometimes confused with unrelated credentials in other industries. On this site, and throughout this overview of ACE-ALM Certification, every fact traces back to AAAE's own program materials. For a plainer definition, see our companion piece on ACE-ALM Meaning and the breakdown of what ACE-ALM stands for.
Who Issues the Credential and Why It Exists
The American Association of Airport Executives owns and administers the entire ACE program, including the Airfield Lighting Maintenance track. AAAE built the ACE designations to give airports a standardized way to verify that maintenance staff and technicians have working knowledge of specialized airfield systems - rather than relying solely on years of on-the-job exposure with no formal benchmark.
For airfield lighting specifically, that benchmark matters because lighting failures directly affect runway and taxiway safety. A technician who understands constant-current regulators, transformers, and bolted joint torque specifications is less likely to introduce errors that compromise visual aids used by pilots during approach, landing, and taxi operations.
The program leans on FAA AC 150/5340-26C as a technical reference point, tying the certification content to guidance airports are already expected to follow. This is one reason ACE-ALM is treated as a credible line item on a maintenance resume rather than a generic vendor certificate.
Exam Format and Scoring
The ACE-ALM exam consists of 100 multiple-choice questions to be completed in 120 minutes. To pass, a candidate needs a score of 70%, meaning at least 70 correct answers out of 100.
AAAE delivers the exam through the TopClass platform using recorded remote proctoring. That means candidates test from their own location but under monitored conditions. Specific technical requirements include:
- A closed-book format - no notes, manuals, or reference material during the exam
- A working computer with functioning webcam and microphone
- A government-issued photo ID for identity verification
- A stable environment free of interruptions, since the session is recorded
Because the exam is closed-book and time-boxed, question familiarity matters as much as raw knowledge. For a deeper look at how the scoring threshold plays out in practice, see ACE-ALM Passing Score 2026: Exactly What You Need to Pass, and for a broader difficulty assessment, read How Hard Is the ACE-ALM Exam? Complete Difficulty Guide 2026.
Key Takeaway
You have roughly 72 seconds per question on average across the 120-minute window - pacing practice matters as much as content review.
Technical Content Areas You Must Master
AAAE's official review-course coverage for ACE-ALM spans a defined set of technical areas. These are not abstract "domains" with weighted percentages published publicly - they are the concrete subject areas the review course and exam draw from. Understanding each one deeply is what separates a candidate who guesses from one who reasons through unfamiliar question wording.
Electrical Fundamentals & Series Circuits
Airfield lighting circuits are wired in series, not parallel, which changes how faults, voltage drops, and current behave across a circuit.
- Ohm's law applications in series-circuit troubleshooting
- How a single failed fixture or connector affects the rest of the circuit
Constant-Current Regulators (CCRs)
CCRs are the backbone of airfield series lighting circuits, adjusting output to maintain consistent brightness across all connected fixtures.
- Step settings and intensity control
- Common regulator fault conditions and troubleshooting steps
Transformers, Connectors, and Bolted Joints
Isolation transformers step current down to individual fixtures, and connection integrity at bolted joints is a frequent real-world failure point.
- Proper torque and connection practices
- Consequences of moisture intrusion or corroded connectors
Light Sources, Fixtures, and Signs
Candidates need familiarity with the range of lamp technologies, fixture housings, and lighted signage used on active airfields.
- Fixture types by location (runway edge, threshold, taxiway centerline)
- Sign legend standards and lighting requirements
Visual Aids & Approach Lighting
Approach lighting systems guide pilots during the critical descent phase, and maintenance errors here carry outsized safety consequences.
- Configuration differences across approach lighting systems
- Coordination with visual glide slope indicators
Electrical Safety, Test Equipment & Standby Power
Safe work practices, correct use of diagnostic tools, and understanding backup power systems round out the practical skill set.
- Lockout/tagout and high-voltage precautions
- Standby generator and power-transfer expectations
- General preventive maintenance scheduling principles
For a full walkthrough of how these topics map onto exam question style, see ACE-ALM Exam Domains 2026: Complete Guide to All Content Areas. If you want a condensed reference to keep nearby during final review, the ACE-ALM Cheat Sheet 2026 distills these same topics into a one-page format.
Registration, Fees, and Timelines
Enrollment mechanics for ACE-ALM are straightforward but worth understanding before you commit money or time:
| Item | Detail |
|---|---|
| Standard enrollment | $555 (members and non-members) |
| Student rate | $395, with a current course schedule submitted at registration |
| What's included | Electronic study modules and one exam attempt |
| Membership | Optional - not required to enroll or sit the exam |
| Printed materials / review courses | Cost extra, not bundled with standard enrollment |
| Failed exam retake fee | $75 |
| Recommended prep time | At least 90 days, per AAAE guidance |
| Enrollment expiration | Exam must be taken within 26 months of enrollment |
Because enrollment includes only one exam attempt, a failed attempt means paying the $75 retake fee rather than re-enrolling from scratch - a meaningfully lower cost than starting over. For the complete pricing picture, including how the student rate compares to standard enrollment, read ACE-ALM Certification Cost 2026: Complete Pricing Breakdown. If you're unsure whether you qualify for enrollment terms or the student pricing tier, check ACE-ALM Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Exam scheduling itself runs through TopClass, and testing windows can shift from year to year. Rather than guessing at availability, review ACE-ALM Exam Dates 2026: Testing Windows, Deadlines & Scheduling before you plan your 90-day study runway.
Who Hires ACE-ALM Holders
ACE-ALM is most relevant to people who already work in or are entering airport maintenance departments, electrical trades serving airports, or contracting firms that service airfield electrical systems. Typical roles connected to this credential include:
- Airfield maintenance technicians responsible for lighting circuits and fixtures
- Airport electricians who maintain constant-current regulators and vaults
- Maintenance supervisors overseeing airfield lighting preventive maintenance programs
- Contractors and vendors bidding on airfield electrical maintenance work
Airports value the credential because it offers a documented, standardized proof point that a technician understands both the equipment and the safety practices tied to FAA-referenced guidance - useful for staffing decisions, contractor vetting, and internal promotion criteria. For a closer look at how the credential can affect compensation and career trajectory, see the ACE-ALM Salary Guide 2026: Complete Earnings Analysis and the broader Is the ACE-ALM Certification Worth It? Complete ROI Analysis 2026. If you're actively job-hunting with this credential in hand, browse ACE-ALM Jobs for role-specific context.
How Preparation Should Be Structured
Generic study advice rarely accounts for the fact that ACE-ALM content is heavily hands-on and equipment-specific. Rather than a one-size-fits-all weekly template, preparation should follow the shape of the technical content itself, front-loading the topics that are conceptually hardest (series-circuit math, CCR behavior) and saving the more procedural topics (safety protocols, test equipment use) for closer to exam day when recall needs to be sharp.
Electrical Fundamentals & Series Circuits
- Work through Ohm's law problems specific to series wiring
- Practice diagnosing where a circuit fault would occur
CCRs, Transformers, and Connectors
- Study regulator step settings and fault symptoms
- Review bolted joint and connector maintenance procedures
Fixtures, Signs, and Visual Aids
- Map fixture types to airfield locations
- Compare approach lighting configurations
Safety, Test Equipment, and Standby Power
- Drill electrical safety procedures until automatic
- Run timed practice sets to match the 120-minute exam pace
This roughly 90-day arc lines up with AAAE's own preparation recommendation. For a more detailed week-by-week breakdown with specific resource suggestions, see the ACE-ALM Study Guide 2026: How to Pass on Your First Attempt. And once you've covered the content, running full-length timed practice sessions on our practice test platform is the most direct way to confirm you can hit 70 correct answers under real exam conditions.
If you're still deciding whether this is the right certification path for your role, our plain-language explainer What Is ACE-ALM? and the related What Is ACE-ALM Certification? walk through the same fundamentals from a slightly different angle, and What Does ACE-ALM Mean? covers the terminology in more depth. For candidates weighing formal training options ahead of self-study, ACE-ALM Training outlines what AAAE's review course actually includes versus self-study.
Frequently Asked Questions
Airport Certified Employee - Airfield Lighting Maintenance. It's a specialty track within AAAE's broader ACE certification program focused specifically on airfield lighting systems.
The exam has 100 multiple-choice questions with a 120-minute time limit. A passing score is 70%, meaning 70 correct answers.
You can retake the exam for a $75 fee. Standard enrollment only includes one attempt, so the retake fee applies to any subsequent attempts within your 26-month enrollment window.
No. Membership is optional. Standard enrollment is $555 for both members and non-members, with a $395 student rate available when a current course schedule is submitted at registration.
AAAE administers the ACE-ALM exam through the TopClass platform with recorded remote proctoring. You'll need a computer with a working webcam and microphone, plus a government-issued photo ID, and the exam is closed-book.