NSN 1680-01-660-2027

An enclosure which includes mounts and protects such items as switches, contactors, relays, connectors, printed cards, and the like. It gathers controls and signalization functions such as fuel pumps, hydraulic ancillaries, navigation and armament systems, electronic countermeasures, and the like. It is located outside and under the aircraft and thus facilitates the acces when the aircraft is on the ground.