Three main division:
Can you parallel AC sources?
What happens if power is connected to a transfer bus?
Automatically disconnects an existing AC source
Does an engine have to be running to disconnect an IDG?
The DRIVE light illuminates for any of the following condtitions:
- IDG Failure
- Engine Shutdown
- IDG automatic disconnect
- IDG disconnected with the DISCONNECT switch
The SOURCE OFF light indicates:
- No source has been manually selected.
- The manually selected source has been disconnected.
The galley power switch provides power to what?
- broadband satellite system
TR UNIT light illuminates when:
- TR1 has failed
- TR2 and TR3 have failed
On the ground, any TR failure causes the light to illuminate.
What is the purpose of TR3?
Serves as a backup
When does the Cross Bus Tie Relay open automatically?
- At G/S capture with the flight director or auto pilot selected to ILS approach
-BUS TRANSFER switch selected to OFF
How long does the battery last on standy power?
Items on the standby power system:
- Switched Hot Battery Bus
- Hot Battery Bus
- Battery Bus
- DC Standby Bus
- AC Standby Bus
When does the ELEC light illuminate?
On the ground only and indicates a fault in the DC power system or the standby power system.
When does the STANDBY PWR OFF light illuminate?
If the AC Standby Bus, DC Standby Bus or Battery Bus is not powered.
AC Power sources: