The (P5) is the nerve center for managing the aircraft’s critical systems, including electrical, fuel, hydraulics, and pneumatics. It is divided into the Forward Overhead and the Aft Overhead , each housing specific controls used primarily during pre-flight, engine start, and system management. Core Overhead System Clusters
: Found on the lower left of the forward panel. This section contains switches for Fuel Pumps (Center, Left, and Right) and the Crossfeed Valve . boeing 737800 overhead panel pdf new
3.6 Lighting and Cabin Systems
: Controls the engine-driven and electric hydraulic pumps that power flight surfaces and landing gear. The (P5) is the nerve center for managing