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63 Abbreviations and Acronyms AC Advisory Circular AGL Airfield Ground Lighting AIP Airport Improvement Program ALCMS Airport Lighting Control and Monitoring System ALSF-2 Approach Lighting System with Sequenced Flashers II Amps Amperes C/L Centerline CAT Category CCR Constant Current Regulator CIE International Commission on Illumination CMU Control and Monitoring Unit FLA Full Load Amps FOD Foreign Object Debris FPM Feet per Minute HDPE High Density Polyethylene HIRL High-Intensity Runway Light ICAO International Civil Aviation Organization IESALC Illuminating Engineering Society of North America IM Infant Mortality IPRF Innovative Pavement Research Foundation kW Kilowatt KWH Kilowatt Hour LED Light-Emitting Diode MALS Medium-Intensity Approach Light System MALSF Medium-Intensity Approach Lighting System with Sequenced Flashers MALSR Medium-Intensity Approach Lighting System with Runway Alignment Indicator Lights MTTF Mean Time to Failure MW Megohm NEC National Electric Code O&M Operations and Maintenance ODALS Omni Directional Approach Lighting System PAPI Precision Approach Path Indicator PCB Printed Circuit Board PCB/PS Printed Circuit Board with integral Power Supply PFC Passenger Facility Charges PLC Programmable Logic Controller PVC Polyvinyl Chloride PWM Portland International Jetport
64 LED Airfield Lighting System Operation and Maintenance REIL Runway End Identification Light ROI Return on Investment RW Runway RWSL Runway Status Lights SCR Silicon-controlled Rectifier TW Taxiway UFC Uniform Facility Code VA Volt-amps VASI Visual Approach Slope Indicator
