Electrical Panel Flashcards
ELECTRICAL PANEL
Q: When performing the PRELIMINARY FLIGHT DECK PREPARATION, what is the minimum Battery Voltage?
Ref: (FOM VOL. II, Section 3.05)
25.5 Volts
ELECTRICAL PANEL
Q: What do you do if it is below 25.5V?
Ref: (FOM VOL. II, Section 3.05)
Select BATT pushbuttons to ON with EXT PWR on aircraft. This starts the charging cycle.
(approximately 20min required)
ELECTRICAL PANEL
Q: When performing the FLIGHT DECK PREPARATION, what are we looking for on the ELEC panel BAT check?
Ref: (FOM VOL. II, Section 3.05)
- ECAM ELEC page – select
- BAT 1 & 2 – OFF then ON
- Check BATT current is < 60 amps after 10 seconds and continues to decrease
ELECTRICAL PANEL
Q: Will the batteries completely drain if you leave the BAT switches in AUTO after AC power is removed on the ground?
Ref: (FOM VOL. III-DSC-24-20)
No. Battery cut-off logic prevents complete discharge when the aircraft is on the ground and unpowered – 22VDC.
ELECTRICAL PANEL
Q: How is the BATTERY BUS normally powered?
Ref: (FOM VOL. III-DSC-24-10-30-20)
DC BUS 1 through a DC tie contactor
ELECTRICAL PANEL
Q: What does the amber FAULT light in the GALLEY pushbutton indicate?
Ref: (FOM VOL. III-DSC-24-20)
At least 1 generator load is above 100% rated output.
ELECTRICAL PANEL
Q: How does the GALLEY pushbutton work in AUTO?
Ref: (FOM VOL. III-DSC-24-20)
Sheds main galley, IFE and in-seat power supply if:
- Only 1 generator (APU or Engine) is available in FLIGHT, or
- Only 1 ENGINE generator is available on the GROUND
ELECTRICAL PANEL
Q: What does a FAULT on the ENG GEN pushbutton indicate?
Ref: (FOM VOL. III-DSC-24-20)
The generator line contactor is open because of a fault detected by the Generator Control Unit (GCU), which could include:
- Overload
- Over/under voltage
- Differential fault (short), and/or;
- The generator line contactor is open
ELECTRICAL PANEL
Q: What does the APU GEN FAULT light indicate?
Ref: (FOM VOL. III-DSC-24-20)
The generator line contactor is open because of a fault detected by the GCU.
ELECTRICAL PANEL
Q: When is the APU GEN FAULT light inhibited?
Ref: (FOM VOL. III-DSC-24-20)
- APU speed too low
- Line contactor OPEN after EXT PWR or ENG GEN takes over
ELECTRICAL PANEL
Q: What is the function of the BUS TIE in the AUTO position?
Ref: (FOM VOL. III-DSC-24-20)
Allows the BUS TIE CONTACTORS to open and close automatically to maintain power to both AC BUS 1 & 2:
- Allows a single source to power the entire system
- Allows connection of the APU GEN or EXT PWR to the system
- Inhibits multiple sources to connect simultaneously
ELECTRICAL PANEL
Q: What does an IDG FAULT light indicate?
Ref: (FOM VOL. III-DSC-24-20)
- “HOTLOP”
- Oil pressure low (inhibited when N2 < 14%
- Oil outlet temperature overheat
Light is inhibited when IDG is disconnected
ELECTRICAL PANEL
Q: What precautions must you take when disconnecting an IDG?
Ref: (FOM VOL. III-DSC-24-20)
- Do not disconnect when the engine is not operating or windmilling
- Do not hold button longer than 3 seconds
ELECTRICAL PANEL
Q: How can an IDG be reset?
Ref: (FOM VOL. III-DSC-24-20)
On the ground by maintenance
ELECTRICAL PANEL
Q: What is the function of the AC ESS FEED pushbutton in the normal position?
Ref: (FOM VOL. III-DSC-24-20)
Allows AC BUS 1 to power the AC ESS BUS
