How are approach lights inspected?
A routine check of each fixture’s output, aiming, structure and electrical connections, so the approach pattern stays reliable.
Approach lights are inspected on a planned schedule. Each elevated fixture is checked at five points: output, aiming and levelling, the mast, the frangible coupling, and the base with its electrical connections.
Frequent visual checks catch failed or dirty lights quickly. Deeper periodic checks cover alignment, structure and electrical condition. Results are compared with the serviceability targets for the runway category, and the surroundings are kept clear of vegetation and obstructions.
Approach Lighting Night Inspection
Frequent visual checks catch failed or dirty approach lights quickly, and the pattern is best checked at night, recording which lights have failed or look dim. Each elevated fixture is checked at five points: output, aiming and levelling, the mast, the frangible coupling, and the base with its electrical connections. Results are compared with the serviceability targets for the runway category. Frequencies and test methods come from the airport’s maintenance programme and national rules.
Frequently Asked Questions
Q1What is checked when inspecting approach lights?
The fixture output and lens, the aiming and levelling of the beam, the mast and its fixings, the frangible coupling, and the base, connectors, earthing and cable insulation.
Q2How often are approach lights inspected?
Frequent visual checks are normally made, with deeper periodic checks and measurements. The exact frequencies come from the airport’s own maintenance programme and the applicable regulation.
Q3Why does aiming and levelling matter?
Each fixture is aimed so its beam reaches an aircraft on the approach path. A fixture that has shifted or tilted can look dim or be missed from where the pilot needs to see it.
Q4What else is inspected besides the light itself?
The surroundings. Vegetation, snow or new obstructions can hide a fixture or block its beam, and the frangible parts must stay intact so the structure still breaks away safely if struck.
Q5How is serviceability tracked?
Annex 14 sets serviceability targets by runway category, covering the share of lights that must work. Inspection results are compared against these and failed lights are repaired promptly.
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