AGL Engineering Case Studies
AGL engineering case studies covering realistic failure modes, diagnostic methods and corrective actions — structured to help others recognize similar patterns in their own systems.
Important: Every case study in this library is a fictional engineering simulation created for training. None is a report of an actual airport incident, and no airport, organisation, person or manufacturer is identified or implied. All readings, values and outcomes are illustrative.
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Frequently Asked Questions
Quick answers about the AGL Engineering Case Studies library.
Q1What are the AGL Engineering Case Studies?
They are a library of 100 Airfield Ground Lighting (AGL) engineering case studies from Precision AGL Academy. Each one walks through a fault investigation from symptoms and hypotheses to testing, root cause, corrective action and verification. They are engineering training simulations, not reports of actual airport incidents.
Q2Are these real airport incidents?
No. The cases are written as real-world-style engineering scenarios to teach fault-finding, and each case page states that it is a training simulation. They are designed so that readers can recognise similar failure patterns in their own systems.
Q3What topics do the case studies cover?
They are grouped into 10 categories: Series Circuit, Cable and Electrical Faults; AGL Isolating Transformers; Constant Current Regulators (CCR); Runway Lighting; Taxiway Lighting; AGL Photometry; PAPI and Approach Lighting; AGL Signs; ALCMS, SCADA and Control; and Advanced Maintenance and Engineering.
Q4How many case studies are in each category?
Series Circuit, Cable and Electrical Faults has 15 (AGL-CS-001 to 015), Isolating Transformers has 15 (016 to 030) and CCR has 10 (031 to 040). Runway Lighting has 10 (041 to 050), Taxiway Lighting has 10 (051 to 060) and AGL Photometry has 15 (061 to 075). PAPI and Approach Lighting has 10 (076 to 085), AGL Signs has 5 (086 to 090), ALCMS, SCADA and Control has 8 (091 to 098) and Advanced Maintenance and Engineering has 2 (099 to 100).
Q5How is each case study structured?
Each case typically includes an overview, learning objectives, system background, problem statement, initial observations, test equipment, a step-by-step investigation, root cause, corrective action and post-repair verification. Most also include engineering lessons, an engineer's decision point, a knowledge check, interview questions and an FAQ.
Q6How do I find a specific case study?
Use the search box to search by case ID (for example AGL-CS-061) or by title, or use the category filter to browse one topic at a time. Every case links to its own page.
Q7Who are the case studies for?
They suit AGL maintenance technicians, airfield electrical engineers, students and anyone preparing for AGL troubleshooting interviews or wanting a systematic diagnostic method.
Q8Do the case studies replace airport procedures or manufacturer documentation?
No. They are for learning and do not replace an airport's approved maintenance, isolation, switching and safety procedures, applicable standards or manufacturer documentation. Any real testing or repair must follow those requirements.
Q9Where can I learn more after reading the case studies?
Precision AGL Academy offers AGL training that builds the underlying knowledge, including fundamentals, electrical systems, fault finding, photometry, installation, testing, commissioning and maintenance.
Turn Case Studies Into Engineering Capability
A case study shows you how a problem is investigated. Precision AGL Academy helps you build the knowledge to understand why it happens, diagnose it systematically, and apply the right engineering approach.
Study real-world-style engineering scenarios, identify failure patterns, understand root causes, and develop a systematic approach to AGL troubleshooting.
Study the case. Understand the system. Build the skill.
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Important Notice, Disclaimer & Limitation of Liability
Please read before relying on any content in this library or on any case study linked from it.
- Purpose and intended users. This page and the case studies it indexes is an independent educational and informational reference for competent, suitably trained and authorised airfield ground lighting (AGL) and aerodrome electrical personnel. It is not professional engineering, legal or regulatory advice, and using it does not create any professional or client relationship.
- Fictional training simulation. Every case study in this library is an engineering simulation created for training. None is a report of an actual airport incident. Scenarios, sequences, dates, readings, measurements, outcomes and numerical values are illustrative and invented for teaching. No fault, failure, cause or liability is attributed to any person, company, airport, regulator, manufacturer or product, and any resemblance to a real event is coincidental. The content is not a forensic, legal, insurance, regulatory or accident-investigation finding and must not be cited as evidence, as a record of an event, or as a basis for disciplinary, contractual, insurance or legal action.
- Safety. Work on series circuits, constant current regulators (CCRs), isolating transformers, cables, connectors and control equipment can be fatal. Always apply the aerodrome’s permit-to-work and isolation/LOTO procedures, prove dead, use correctly rated instruments and PPE, and follow the manufacturer’s instructions. Nothing here authorises work on live equipment or the bypassing of any safety device or interlock. Where a case narrates an inspection, measurement or test, that narrative is not an instruction or an endorsement of the method.
- Values, test results and acceptance. Test voltages, insulation-resistance and current values, tolerances, thresholds, photometric and angular figures and pass/fail or “acceptable” wording in a case are specific to its invented scenario. They are not acceptance criteria, limits or targets. Use the project specification, the applicable standard and the manufacturer’s data for real work. Completing or following a case produces no test certificate, calibration record, acceptance or evidence of compliance.
- Aviation operations. Nothing here authorises return to service, a change of operating category (CAT I/II/III), a NOTAM, a flight inspection outcome or any aerodrome certification decision. These rest with the aerodrome operator, the air navigation service provider and the competent regulator.
- Standards and regulations. References to ICAO, FAA, IEC, IEEE, ISO and other standards are for orientation only. They are summarised, may be incomplete or out of date, and standards are revised from time to time. Consult the current official editions. Following this content does not guarantee compliance with any law, standard or regulatory approval. Official documents, regulations and manufacturers’ instructions always prevail.
- Learning aids. Knowledge checks, decision points, interview questions, FAQs and suggested answers are teaching aids with illustrative answers. They are not an assessment, certification, accreditation or competency or authorisation to work on any aerodrome, and they do not predict or guarantee the outcome of any job interview or application.
- Generic content; no warranty. Diagnostic sequences, cause rankings, tolerances and values are generic and indicative; real installations differ in design, equipment make and model, age and condition. Content is provided “as is” and “as available”, without warranty of any kind, express or implied, including accuracy, completeness, currency or fitness for a particular purpose.
- Limitation of liability. To the fullest extent permitted by applicable law, Precision AGL Academy and its owners, authors and contributors are not liable for any injury, death, loss, damage, downtime, penalty or regulatory consequence, whether direct or indirect, arising from the use of, reliance on, or inability to use this content. Nothing in this notice excludes or limits any liability that cannot lawfully be excluded or limited.
- Independence and trademarks. This is an independent publication, not affiliated with or endorsed by ICAO, the FAA, the IEC, DGCA, any airport, regulator or equipment manufacturer. Third-party names, standard designations and trademarks belong to their respective owners and are used for identification only.
- Copyright and use. © 2026 Precision AGL Academy. All rights reserved. You may read this page and use it for personal reference and internal training, keeping this notice attached. Any other copying, republication, redistribution, scraping or commercial use requires our prior written permission.
- Corrections. Content is reviewed periodically, with no obligation to update. To report an error, safety concern or rights issue, write to precisionaglsolutions@gmail.com.