If you look at high-resolution diagrams, you may notice small "+" marks on the panels. These aren't just for decoration; they mark the location of coaxial power connectors for the panel's internal lighting. They also serve as helpful pull points for maintenance crews when they need to remove and repair a panel.
During cruise, the 737-800 overhead panel should be eerily quiet and dark. Only the Recirculation Fans , Equipment Cooling (normally in AUTO), and perhaps the Window Heat lights remain illuminated. Any extraneous light or switch movement draws immediate attention. Standard operating procedures (SOPs) require the Overhead Panel to be checked during the Before Start , After Start , Before Takeoff , After Landing , and Parking flows. A common student error is to “button push” unnecessarily; the modern 737-800’s panel is designed to require minimal pilot intervention once airborne. boeing 737800 overhead panel pdf new
The -800 uses a more modern Digital Cabin Pressure Control System , which is managed via the pressurization panel on the overhead to automatically maintain cabin altitude during flight. If you look at high-resolution diagrams, you may
The overhead panel is the "brain" for the aircraft's mechanical systems, divided into the Forward Overhead: During cruise, the 737-800 overhead panel should be