The defect-driven counterpart to Division 01. Corrective maintenance begins when an inspection, failure, test result or abnormal condition identifies a defect requiring diagnosis, repair, replacement, testing and restoration — carried out to return AGL equipment to full, verified service.
Philosophy: a corrective-maintenance job is not complete simply because the defective component has been physically replaced. The full cycle establishes that the original defect is corrected, the equipment is correctly reassembled and connected, it functions correctly, the work area is restored, any associated defect is addressed, and records are completed.
Every corrective-maintenance task in this division follows the same underlying sequence, regardless of asset type — from initial detection through to closure and trend review.
Every defect is classified consistently with the handbook's established framework, and the classification drives the response.
| Priority | Meaning | Typical Action |
|---|---|---|
| Critical | Immediate operational / safety significance | Immediate action |
| Major | Significant degradation / failure | Priority corrective action |
| Minor | Limited impact | Planned repair |
| Observation | Condition requiring monitoring | Monitor / trend |
Corrective maintenance can originate from five sources, each feeding into the same assessment and repair cycle.
Grouped by asset type — click any topic to expand its corrective activities and post-repair verification.
Note: the cause of failure should also be considered rather than simply replacing the lamp.
After replacement: lens installed → fixture sealed → alignment verified → illumination checked → record completed.
Replace with the approved component and verify optical performance / function after reassembly.
Decision: determine whether the housing is repairable or requires complete fixture replacement.
After replacement: secure fixture → verify alignment → verify stability → complete functional check.
After replacement: confirm the fixture is correctly restored.
After replacement: verify connection, insulation condition, polarity / connection arrangement, and perform functional check.
Sequence: identify → isolate → remove → inspect interface → install → align → connect → test → restore → record.
Root cause: the repair should address the root fault, not merely clear the alarm.
After replacement: component replaced → wiring verified → power restored → output checked → control checked → alarm checked → record.
After replacement: verify connector, termination, sealing, locking, cable lead, and perform functional / electrical verification.
Method: appropriate to the cable system and approved maintenance procedure.
After repair: joint completed → sealing verified → electrical test → functional verification → record.
After repair: verify electrical and mechanical integrity.
After repair: verify mechanical connection, continuity where applicable, perform earth testing, record results.
After repair: verify unit operation, alignment, elevation / beam condition, and complete required photometric verification.
After repair: verify message, illumination, colour / visibility, mounting, and record.
After replacement: verify complete sign operation.
After repair: verify structural condition, fixture alignment, illumination, cable / connection, and restore the area.
After repair: verify illumination and operational function.
Verify flashing operation where applicable.
After correction: fault identified → corrective action → communication verified → command verified → feedback verified → alarm verified → record.
After replacement: restore configuration, verify communication, command, feedback, alarms, and record.
A major improvement for this division is to avoid "replace and close" maintenance. For recurring failures, the diagnostic chain below is worked through before the job is closed.
The full lifecycle a defect moves through, from initial identification to trend review.
Recorded and severity classified.
Operational impact assessed against the fault.
Fault diagnosis and corrective action planned.
Safety and isolation applied where required.
Corrective action carried out.
Electrical / mechanical verification and functional test.
Area restoration and FOD removal.
Equipment restored to service.
Full record completed and defect closed.
Root-cause / trend review if the defect is recurring.
Quick answers about corrective maintenance, based on the topics in this division.
Corrective maintenance is the defect-driven counterpart to preventive maintenance. It begins when an inspection, failure, test result or abnormal condition identifies a defect that needs diagnosis, repair, replacement, testing and restoration, so that AGL equipment is returned to full, verified service.
Division 02 (Corrective Maintenance) contains 34 topics in four groups: Group A Lighting Fixtures (10 topics), Group B Electrical Equipment (8 topics), Group C AGL Systems (10 topics) and Group D Restoration (6 topics).
No. The job is closed only when the full chain is complete: defect identified, cause assessed, repair completed, equipment tested, function verified, area restored, returned to service, record completed and defect closed. The full cycle establishes that the original defect is corrected, the equipment is reassembled and connected correctly, and any associated defect has been addressed.
Every task follows the same ten-step sequence regardless of asset type: Detect, Assess, Diagnose, Plan, Isolate, Repair/Replace, Test, Restore, Monitor and Close.
Every defect is classified as Critical (immediate operational or safety significance, immediate action), Major (significant degradation or failure, priority corrective action), Minor (limited impact, planned repair) or Observation (a condition needing monitoring, monitor and trend). The classification drives the response.
Five sources feed the same assessment and repair cycle: routine inspection, detailed inspection, equipment failure, a non-conforming test result, and special inspection after events such as lightning, flooding, severe weather, an accident or incident, construction or major maintenance.
It describes replacing a failed part and closing the job without asking why it failed. For recurring failures the handbook works through a root-cause chain first: what failed, why, whether the component was defective, and whether installation, moisture, overheating, electrical stress, mechanical damage or environmental exposure was involved. If the failure is recurring, it is escalated into a condition assessment or corrective-action review.
It should capture the asset ID, location, circuit and equipment type; the defect description and failure symptom; the date and time detected and the source of the defect; and the operational and safety impact, required action and classification.
Corrective maintenance is more than reacting to a reported defect.
Build the technical knowledge to diagnose root cause, apply the correct repair, verify restoration, and prevent the same failure from recurring across the airfield.
Diagnose with purpose. Repair with confidence. Prevent recurrence.
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