Electrical power Flashcards
FUEL Quantity Indicator
Available with AC or DC power
L igniter
R igniter
L: powered from AC transfer bus
R: powered from AC standby bus
APU Start
Electrical power from no 1 Transfer Bus, or the a/c main battery if no AC power available
All Fuel pumps
AC operated
Fuel temperature Indicating System
Temperature indicating system uses AC power
Fuel crossfeed valve
Spar fuel shutoff valve
Engine fuel shutoff valve
- DC power from Battery bus
- DC power from Hot battery bus
- DC power from battery bus
Emergency exit lights armed
illuminate automatically when A/C electrical power to DC bus 1 fails or AC power is off.
Overwing Exit doors
Lock system 28V DC
Electrical power for Galley
115V AC from Aircraft transfer buses.
ENG BLEED AIR VALVE
DUCT PRESSURE TRANSMITTER
ISOLATION VALVE
APU BLEED AIR VALVE
- when apu shut down
E - DC activated and PRESSURE operated
D - Indicator is AC operated
I - AC operated
A - DC controlled and PRESSURE operated, when APU is shut down it automatically closes
Recirculation Fans
Driven by AC motors
Controller powered
- man mode powered
C - by DC motors
M - Seperate DC motor powered by DC Standby System
wing anti-ice
AC motor powered
- ENG OVHT/DET powered
- ENG FIRE EXTINGUISHER powered
E - powered by BATT BUS
E - powered by HOT BATT BUS
- APU FIRE detection powered
- APU FIRE extinguisher powered
A - powered by BATT BUS
A - powered by HOT BATT BUS
