AGL Troubleshooting Engine
A guided fault-finding tool for airfield ground lighting, built on a database of 350 web-verified fault records across 19 equipment and system groups. Describe the problem in plain language and let the engine narrow it down with a live Diagnostic Match score, work a fault as a one-at-a-time Next Best Test, check readings against a known-good unit or the built-in calculators, and generate a signed-off report. Switch between Technician and Engineer view to suit the job.
Describe the Problem
Type what you're seeing on site — the engine extracts equipment, symptom, location and readings, then ranks candidates.
NewDatabase Search
Search all 350 fault records by equipment, symptom or keyword.
350 RecordsGuided Diagnosis
Select equipment, select the fault, work the diagnostic questions in order.
Step-by-StepCritical Faults
Quick reference for all High-severity fault records, grouped by equipment.
64 High-SeverityAGL Calculators
Ohm's law, voltage drop, CCR output deviation and photometric uniformity — fed straight into diagnosis.
NewSystem Map
Power → Control → Series Circuit → Visual Equipment → Photometry. Click any equipment to jump into diagnosis.
NewCRITICAL FAULTS QUICK REFERENCE — all 64 High-severity records from the database, grouped by equipment. Click any fault to open the full diagnostic record.
Standards Register
The 14 FAA, ICAO and DGCA references this database draws on, web-verified 16 Aug 2026.
Airfield Lighting Diagnostics & Remote Diagnostics
Airfield lighting system diagnostics
Airfield lighting system diagnostics is the process of finding why part of the lighting system is not working as it should. It combines the symptom, the circuit and equipment concerned, field measurements and the control system status. The engine above guides this step by step, from symptom to likely cause and the tests that confirm it.
Airfield lighting remote diagnostics
Airfield lighting remote diagnostics uses the control and monitoring system, CCR status, alarms and event logs to narrow down a fault without going to the field first. It saves time and helps decide who to send and what to carry, but the fault should still be confirmed and the repair checked on site.
Frequently Asked Questions
Quick answers about the AGL Troubleshooting Engine.
Q1What is the AGL Troubleshooting Engine?
The AGL Troubleshooting Engine is a free guided fault-finding tool from Precision AGL Academy for airfield ground lighting. It is built on 350 fault records across 19 equipment and system groups, with 14 FAA, ICAO and DGCA references and 64 High-severity faults.
Q2Which AGL equipment and systems does it cover?
It covers 19 groups, with the number of fault records in brackets: CCR (20); Series Circuit (20); Isolation Transformer (20); L-823 Connector (20); AGL Cable (20); Runway Edge Light (20); Runway Centreline Light (15); TDZ Light (15); Taxiway Edge Light (20); Taxiway Centreline / Guidance (15); Stop Bar / Guard Light (15); Approach Lighting (20); PAPI (20); Airfield Signage (20); ALCMS / Control & Monitoring (20); Earthing / Lightning / Surge (15); Photometry / Optical Testing (20); Installation / Commissioning (20); Power Supply / Standby Power (15).
Q3How do I use the engine to find a fault?
Choose one of six modes. Describe the Problem lets you type what you see on site and ranks candidate faults. Database Search searches all records by equipment, symptom or keyword. Guided Diagnosis takes you through the diagnostic questions for a selected fault. Critical Faults lists the High-severity records. AGL Calculators runs common calculations. System Map shows the system hierarchy, and clicking an equipment group starts diagnosis for it.
Q4What does each fault record contain?
Each record has the equipment, the fault, three diagnostic questions, the test method, the evidence to look for, the corrective action, the standard reference, severity, verification steps, preventive action, notes, tools, safety notes, spares and mean time to repair (MTTR).
Q5Is the Diagnostic Match a probability?
No. The ranked list shows a Diagnostic Match, not a statistical probability, and it shows which fields drove each record's score, such as the fault description, the equipment or a measurement reading you entered.
Q6Are there safety checks before high-risk tests?
Yes. High-severity records with safety notes show a safety gate before the questions appear, asking whether you are authorised and equipped to proceed. If you decline, the engine stops. Each question also has a 'Why this test?' explanation.
Q7Which calculators are included?
The AGL Calculators mode has four: Ohm's Law (V, I, R and power), Voltage Drop on a series two-conductor loop, CCR Output Deviation against the rated or selected step, and Photometric Uniformity from a list of readings.
Q8Can I save or print a diagnostic report?
Yes. Diagnosis result screens have Export Report and Print buttons, plus Save Case and Share Case. You can add the airport or project, circuit or asset ID, technician and remarks. Saved cases are kept in your own browser, and entering a circuit ID shows previous faults on that circuit.
Q9What is the difference between Technician and Engineer interface?
It is the same engine with two views. Technician shows plain steps only, and Engineer shows the full diagnostic detail.
Q10Which standards does the engine reference?
The Standards Register lists 14 references, web-verified on 16 Aug 2026: ICAO Annex 14 Volume I; FAA AC 150/5340-18H; FAA AC 150/5345-44L; FAA AC 150/5345-46F; FAA AC 150/5345-26E; FAA AC 150/5345-47C; FAA AC 150/5345-10H; FAA AC 150/5345-7F; FAA AC 150/5345-28H; FAA AC 150/5345-56B; FAA AC 150/5340-26C; FAA AC 150/5340-30J; FAA AC 150/5345-53D; DGCA CAR Section 4, Series B, Part I.
Q11Does the engine replace manufacturer manuals or a permit-to-work?
No. It is a diagnostic aid for trained AGL personnel. It does not replace the manufacturer's manuals, your airport's approved procedures or a permit-to-work, and you should isolate and prove dead before working on any series circuit.
Diagnose the Fault. Understand the System. Build AGL Expertise.
Effective AGL troubleshooting starts with understanding how the circuit, equipment and controls behave before something goes wrong.
Learn how series-circuit behaviour, equipment faults, diagnostic sequences and FAA, ICAO and DGCA requirements connect across the complete AGL system.
Turn technical reference knowledge into a deeper understanding of how AGL assets are planned, managed, operated and sustained throughout their lifecycle.
Diagnose better. Understand the system. Build technical capability.
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