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• [b737ng:dc_bus_1]

DC Bus 1

DC Bus 1 is normally powered by TR1, with alternate power from TR2 or TR3.

28V DC bus 1

• AFCS A Rudder DC
• APU Fire Switch
• B System Electric Hydraulic Pump Controller
• Bus Power Control Unit
• DC Bus Section 1
• DC Bus Section 2
• DC Bus 1 Xfr
• DC Standby Bus Section 1
• DC Standby Bus Section 2
• Elex Panel Aft Center
• Generator 1 Load Shed
• Master Dim Section 7
• Master Dim Section 1, 2, 3 & 4
• Pack Control Valve L Alternate
• Ram Air Module Controller L
• SPCU Normal
• Vacuum Waste Controller
• Water Drain Valve
• Water Quantity Indication

28V DC bus 1 section 1

• AFCS A Engage Interlock
• AFCS A Rudder DC (Cat IIIb)
• Autothrottle DC 1
• Cabin Crew Call
• Cargo Fire Detection Aft A
• Cargo Fire Detection Fwd A
• Charger L Aft
• Charger R Aft
• Door Area Heat Controller
• Emergency Exit Light Charger Fwd
• Engine 1 Cowl Anti-ice Valve
• Engine 1 Run/Power
• Engine 1 Thrust Reverser Indication
• FCC A DC
• Flight Recorder DC
• FMCS Bite DC
• Head Up Guidance Computer DC
• Head Up Guidance Controller Panel DC
• Lavatory Smoke
• Light Control
• Low Flow Detect Exhaust
• Mach Trim A DC
• MCP DC 1
• Passenger Sign Control
• Pax Call L
• Recirc Fan L Controller
• SELCAL
• Terrain Display
• Windshield Wiper L
• Yaw Damper 1 & 2 DC

28V DC bus 1 section 2

• 28V DC Ground Service Bus
• 28V DC Service Outlet
• Air/Ground System 1
• Airconditioning Pack Controller L DC
• Anti-skid Outboard
• Autobrake Bite Controller 1
• Autoslat DC 1
• Bleed Air Valve L
• Bleed Air XDCR L
• Captain Probe Indication
• CMU/ACARS DC
• DC Bus 1 Indication
• ELT
• Engine 2 Hydraulic Pump Depressurisation Valve
• Equipment Cooling Supply Fan Controller Alternate
• Flap Load Relief
• Flap Shutoff Valve
• Flight Control Shutoff Valve Controller
• FSEU DC 1
• Fuel Controller Tank L Auto Shutoff Valves
• Fuel Quantity Tank 1
• Landing Transfer Valve Primary
• Landing Transfer Valve Secondary
• Master Caution Annunciator Bus 1
• Master Dim Bus 1
• Overwing Exit Flight Lock Left
• Pressurisation Controller Auto 1
• PSEU Primary
• PTU Valve Controller 1
• PTU Valve Controller 2
• Ram Air Controller L

Categories: Boeing 737NG | Electrical