Definition
A category of FAA equipment and infrastructure used to support the day-to-day administrative and operational running of FAA facilities, rather than the equipment that directly controls air traffic. ADSY appears in FAA NOTAMs and status reports to identify outages or work affecting these support systems.
Plain English
The behind-the-scenes office and facility systems the FAA uses to keep its operations running, as opposed to the radar, radios, and navigation gear that directly handle aircraft.
Context Anchor
Seen in FAA acronym, abbreviation, and NOTAM contraction lists; it is uncommon in normal cockpit use.
Derivation
ADSY is built from parts of the words administrative and systems. That helps show that the abbreviation points to support systems, not to aircraft navigation equipment.
Why Pilots Care
Pilots rarely deal with ADSY directly, but the abbreviation may show up in NOTAMs or facility notices. Recognizing it lets a pilot quickly identify that the item refers to administrative support systems and not to navigation or air traffic control equipment they need for flight.
Intuition Check
Do not read ADSY as an aircraft display or surveillance system. In this context, it means administrative support equipment systems.
Example Sentence 1
The NOTAM listed an ADSY outage at the regional FAA facility, which had no effect on tower or approach services.
Example Sentence 2
Inspectors reviewed the ADSY logs during the annual facility check.