What visibility is required for a category B airplane LPV approach when the MALSR are out of service?

For a category B airplane performing an LPV (Localizer Performance with Vertical guidance) approach when the MALSR (Medium Intensity Approach Light System with Runway Alignment) are out of service, a visibility of 4,500 RVR (Runway Visual Range) is required. This requirement ensures that pilots have sufficient visual reference to safely conduct the approach and landing, especially in cases where critical enhancements to visibility provided by the MALSR are not operational.

Visibility requirements are determined based on the type of approach and the category of the aircraft. In situations where the light systems that assist with visual guidance are inoperative, the minimum visibility must be higher to compensate for the reduced visual cues that are normally available with those systems in use. The 4,500 RVR standard is aligned with the safety protocols governing instrument approaches and ensures sufficient visual reference for safe aircraft operation under decreased visibility conditions.