Definition
A cluster of warning, caution, and advisory lights in the cockpit that illuminate to alert the pilot to specific aircraft system conditions, such as low oil pressure, low fuel, alternator failure, or vacuum system failure. Each light is labeled with the condition it represents and typically uses standardized colors: red for warnings requiring immediate action, amber or yellow for cautions, and green or white for advisory or status information.
Plain English
A panel of small labeled lights that turn on to tell the pilot when something in the airplane needs attention. Each light is tied to a specific system, and the color shows how urgent the issue is.
Context Anchor
Seen during cockpit checks, engine start, and flight when the pilot checks whether any warning or caution lights are on.
Derivation
From the verb 'announce' — to make something known. An annunciator is something that announces. The panel literally announces the status of aircraft systems to the pilot.
Why Pilots Care
They deliver instant visual alerts for system malfunctions so the pilot can respond quickly and maintain safe flight.
Intuition Check
Do not think of annunciator panels as ordinary switches or controls. Their main job is to show or announce a condition, not to fix it by themselves.
Example Sentence 1
During the preflight check, the pilot pressed the test button to confirm that all the lights on the annunciator panel were working.
Example Sentence 2
A low fuel pressure condition caused several lights to activate on the annunciator panels during cruise.