TIE-IN FACILITY
Pilot/Controller Glossary with JO 7110.65BB, Change 3, effective July 9, 2026 · Official text on faa.gov
The FSS primarily responsible for providing FSS services, including telecommunications services for landing facilities or navigational aids located within the boundaries of a flight plan area (FPA). Three‐letter identifiers are assigned to each FSS/FPA and are annotated as tie‐in facilities in the Chart Supplement and accessible through FAA Order JO 7350.9, Location Identifiers. Large consolidated FSS facilities may have many tie‐in facilities or FSS sectors within one facility.