This division is not the testing procedure itself. It verifies whether AGL electrical tests, functional tests, photometric measurements, calibration activities, and acceptance-test evidence have been properly performed, correctly documented, and are traceable — checking whether the correct instrument was used, whether it was calibrated, whether the results are traceable, and whether they meet the applicable acceptance criteria.
Scope boundary — This division is not the procedure for performing insulation-resistance, continuity, earth-resistance, photometric, CCR, transformer, or other technical tests. It verifies: was the correct test performed, using the correct calibrated instrument, properly documented, traceable, and does the result meet the applicable acceptance criteria — with sufficient supporting evidence available.
Verification that applicable insulation-resistance (IR) test evidence is available and that the test instrument, calibration status, location, method, results, and conclusion are correctly recorded and supported.
Verification that continuity-test evidence is available, that the instrument used is identified and within calibration, and that recorded results are checked against the applicable acceptance criteria.
Verification that applicable earth-resistance test records are available, that the earth-pit/electrode identification and instrument calibration are valid, and that the documented conclusion is supported by the recorded result.
Verification of applicable AGL cable test evidence, including cable/circuit identification, test date, route/location, method, recorded results, and traceability of the result to the specific cable tested.
Verification of isolating-transformer test evidence, including asset ID/rating/serial number where applicable, test date, method, results, and that the result is correctly linked to the correct transformer.
Verification that applicable CCR output testing is documented, including CCR/circuit identification, output-current and intensity-step results, measurement instrument, and traceability of the result to the specific CCR and circuit.
Verification that applicable AGL functional testing is documented, that the tested system/function and required functional checks are clearly identified, and that control/feedback, alarm, and remote-control test evidence supports the final conclusion.
Verification that the photometry report is complete, identifiable, and traceable — covering airport, runway/taxiway, fixture/system, measurement location, method, and that the recorded data supports the reported pass/fail conclusion.
Verification that the calibration certificate for the photometric measurement equipment is available, complete, attributable to the instrument used, and that calibration remained valid on the measurement date.
Verification that sufficient information about the measurement setup is documented — equipment configuration, position, orientation, reference points, and environmental conditions — and that the setup is consistent with the reported results.
Verification that recorded measurements can be traced end to end — from result to instrument, from instrument to its applicable calibration record, and from result to the relevant AGL asset/circuit and test date.
Verification of test-instrument identification — manufacturer, model, serial number or unique equipment ID — and that the instrument can be linked to the specific test activity and report it was used for.
Verification that instrument calibration was valid at the time of testing — checking calibration interval, expiry against the test date, status marking, and documentation of any calibration deviation or exception.
Verification that required acceptance-test evidence is available — factory/pre-delivery, site acceptance, and commissioning records — with applicable witness sign-off, supporting photographs/data files, and closure of any outstanding test issues.
Common classification scheme, verification workflow, technical control logic and records that apply across all 14 Division 20 inspection topics.
Every test-record observation should be assigned an appropriate status:
NormalTest evidence complete, valid, traceable, and meeting acceptance criteria.
DefectiveMinor documentation gap, transcription issue, or unclear item identified but overall evidence remains usable.
UnserviceableTest result does not meet acceptance criteria, or evidence cannot be relied upon as presented.
Immediate Action RequiredExpired calibration, missing critical evidence, or unsupported conclusion presenting a compliance/safety risk requiring immediate escalation.
The following sequence applies across all Division 20 topics:
A test report should never be accepted merely because a numerical result is present. Four questions must each be answered:
Photometry topics additionally check the relationship between report, data, instrument and calibration:
If any link in this chain is missing, the report should be flagged for technical review rather than marked "Pass" on reported values alone.
The following should trigger technical review/nonconformance evaluation:
Each test record reviewed should provide:
Division 20 verifies
It does not replace
Quick answers about testing, photometry & calibration inspection in the AGL Inspection Handbook.
Division 20 contains 14 published topics (Level 3, documentation and traceability review). It is not the testing procedure itself. It verifies whether AGL electrical tests, functional tests, photometric measurements, calibration activities and acceptance-test evidence were properly performed, correctly documented and are traceable.
No. The individual test procedures explain how to test, while Division 20 explains how to verify that the testing was properly done and documented. It does not replace insulation-resistance, continuity, earth-resistance or photometric measurement procedures, or the CCR and transformer test procedures.
A report should never be accepted merely because a numerical result is present. Test result asks what was measured, test validity asks whether the instrument and method were correct, test traceability asks whether the test is linked to the asset, date and record, and test acceptance asks whether the result meets the applicable requirement.
Photometry topics also check the chain linking the report, measurement data, instrument ID, calibration certificate, validity on the test date, setup, fixture ID and acceptance criteria. If any link is missing, the report is flagged for technical review rather than marked Pass on the reported values alone.
High-priority findings include an unidentified instrument, a missing or expired calibration certificate, an instrument ID mismatch, test date inconsistency, an asset or circuit mismatch, missing acceptance criteria, a failed result, an inadequately documented setup, and a conclusion unsupported by the data.
Normal means test evidence is complete, valid, traceable and meets acceptance criteria. Defective means a minor documentation gap, transcription issue or unclear item exists but the evidence remains usable. Unserviceable means the result does not meet acceptance criteria or the evidence cannot be relied upon as presented. Immediate Action Required covers expired calibration, missing critical evidence or an unsupported conclusion presenting a compliance or safety risk.
Yes. This handbook is an uncontrolled educational reference, not an approved procedure. The airport's approved inspection schedule, SMS procedures, ATC instructions, NOTAM procedures and local aerodrome regulations always take precedence, and the current revision of any official document should be verified before use.
Yes. Each inspection topic has a Download as Word option that produces an uncontrolled Word checklist template (description, a tick-box inspection table and an inspector sign-off block) for personal reference and internal training, to be reviewed and adopted under the user’s own document control.
Testing, photometry and calibration inspection is where measurement-accuracy and instrument-condition awareness begins. Go beyond identifying defects and build the technical knowledge to understand why abnormalities occur, how they affect system serviceability, and when further testing, troubleshooting, maintenance or corrective action is required.
Develop structured knowledge across:
Learn to connect the inspection process with the wider AGL engineering lifecycle.
Inspect with purpose. Understand the system. Act with technical confidence.
Please read before relying on any content on this page or on any record downloaded from it.