RWSL is equipped with automatic intensity settings and must be operated on a continuous basis except under the following conditions:
If a pilot or vehicle report indicates any portion of the RWSL system is on and is not able to accept an ATC clearance; then
ATC must visually scan the entire runway. If the runway is observed to be clear and the lights are still illuminated, then the lights must be turned off and clearance re-issued.
If a portion of the runway is not visible from the tower, ATC must visually scan the ASDE system. If the runway is observed to be clear and the lights are still illuminated, then the lights must be turned off and clearance re-issued.
When the RWSL Operational Status displays “Lost Comm with System,” consider the RWSL system out of service until checked and confirmed to be operational by technical operations personnel.
Once RWSL systems are turned off, they must remain off until returned to service by technical operations personnel.
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