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The mission of the Lighting Systems is to develop, acquire, deploy, maintain, sustain and improve lighting products and services for the national airspace system. Approach Lighting System Improvement Program The Approach Lighting System Improvement Program (ALSIP) was primarily established to replace older rigid structure approach lighting systems with low impact resistant structures. In the late 70’s the National Transportation Safety Board recommended the FAA expedite the retrofit of approach lighting systems structures with frangible materials and fittings. |