is broken; is out of order
My car is broken down.
Nuestro televisor está averiado.
Our television is broken.
El aire acondicionado está averiado.
The air conditioning is broken.
Este auto viejo siempre está averiado.
This old car is always broken down.
El casco del buque está averiado.
The ship's hull is damaged.
The bus is broken down.