Evaluation of Revised Approach Lighting Criteria

The Federal Aviation Administration (FAA) has directed conversion of all ALSF-1 Category I ILS approach lighting systems with sequenced flashing lights to the Simplified Short Approach Lighting System with Runway Alignment Indicator Lights (SSALR) and Medium Intensity Approach Lighting System with Runway Alignment Indicator Lights (MALSR). The Air Force is concerned that this lighting change may have an adverse affect on the operational capability of some of its units. Therefore, Headquarters Air Force requested the USAF Instrument Flight Center (USAFIFC) conduct an in-flight pilot factors (PIFAX) evaluation of the MALSR and SSALR approach lighting systems.