Definition
In aircraft electrical systems, devices that consume electrical power to perform a useful function, such as lights, motors, heaters, radios, and instruments. Each appliance draws current from the aircraft's electrical bus and is protected by a circuit breaker or fuse sized for its load.
Plain English
Anything on the aircraft that uses electricity to do a job — lights, fans, pumps, radios, heaters, and similar items.
Context Anchor
Seen in aircraft electrical system discussions, especially when identifying what is using battery or generator power.
Derivation
From Latin 'applicare,' meaning 'to attach or apply.' An appliance is something applied to a task — in this case, an electrical device applied to a specific job aboard the aircraft.
Why Pilots Care
Knowing which appliances are powered by which bus matters when troubleshooting electrical failures or shedding load after an alternator or generator failure.
Intuition Check
Do not read appliance as only a household item like a toaster or refrigerator. In this aviation context, an electrical appliance is any aircraft device that uses electrical power to do work.
Example Sentence 1
The technician verified that all electrical appliances on the avionics bus drew current within their rated limits.
Example Sentence 2
Maintenance personnel inspected every electrical appliance after the battery was replaced.