ADB Safegate AXON, User Manual

Page: 35 / 88

There are several key external factors that influences the service life of a product.
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Aircraft traffic movements
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Location on the airfield
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Maintenance
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Chemical usage
Air Traffic Movements (ATM)
The expected lifetime of a light fixture will be highly impacted by the traffic volume and the number of aircraft that are
mechanically putting stress on the light fixtures. Airports with a higher traffic volume will have a light fixture with a shorter
expected lifetime than an airport with a lower traffic volume.
The ATM can be divided into three categories for the recommendation of inspections as well as for the expected lifetime of a
light fixture
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.
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0-100k movements/ year
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100k-200k movements/ year
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>200k movements/ year
Location on the airfield
The expected lifetime of a light fixture is highly dependent on the location where it is installed on an airfield. Three different
areas have been defined by color categorization that are exposed to different degree of mechanical impact. These three
categories are used as a basis for the recommendation of inspections as well as for the expected lifetime of a light fixture.
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RED – Touch Down Area defined as 6m either side of the runway centerline for a distance starting 50m before the TDZ
markings and extending to 200m beyond the TDZ markings as seen from the landing direction.
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RED – Rapid Exit Taxiway centerline lights from the runway centerline to 50m beyond the edge of the runway.
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Amber – All runway areas outside of the red areas. Also includes taxiway intersections for which more than 50% of the
aircraft traffic turn more than 45 degrees.
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Green – Areas outside Red and Amber areas
Tip
It is recommended that there is a reliable means of recording the location history of fittings (similar to ADB Safegate
ALIS) to ensure that the maximum duration in critical areas (RED) of the runway are not exceeded.
Preventive maintenance
Preventive maintenance and inspections will help to prolong the service life of a light fixture. By finding issues (e. g., bad
gaskets or broken prisms) at an early stage you can mitigate and fix issue before they cause more damage and reduce the
cost of the repair. You can also increase the service life of a light fixture by rotating the installation location of light fixtures in
critical areas.
Regular inspections and well-defined preventive maintenance planning will help to reduce the overall maintenance cost and
reduce downtime from reactive maintenance tasks.
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Based on ADB SAFEGATE's field experience and investigation made together with an independent consultant and airport.
UM-5055, Rev. 1.0.9, 2022/04/29 25
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