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Sequenced Flashing Lights (SFL)

JO 7110.65BB, Change 3, effective July 9, 2026 · Official text on faa.gov

Operate Sequenced Flashing Lights:

  1. When the visibility is less than 3 miles and instrument approaches are being made to the runway served by the associated ALS.
  2. As requested by the pilot.
  3. As you deem necessary, if not contrary to pilot's request.