Electrical Flashcards
1
Q
BAT DISCHARGE
A
Indicates excessive battery discharge
Will not illuminate if AC Transfer bus 1 is powered
Normal during APU Battery Start
2
Q
TR UNIT
A
On the ground - TR 1, 2, or 3 has failed
In flight - TR 1 or 2 and 3 have failed
3
Q
ELEC
A
Indicates a fault in the DC Power or Standby power system
Illuminates only on the ground
4
Q
STANDBY POWER OFF
A
- AC Standby bus is unpowered
- DC standby bus is unpowered
- Battery bus is unpowered (with the BAT switch on)
5
Q
DRIVE
A
- IDG oil pressure is low
- under frequency issue with engine running
- Automatically or manually disconnected
- engine shutdown
6
Q
TRANSFER BUS OFF
A
Transfer bus not powered
7
Q
SOURCE OFF
A
AC Transfer bus is not powered by the last manually selected source
8
Q
GEN OFF BUS
A
IDG is not supplying power to it’s related transfer bus
9
Q
APU GEN OFF BUS
A
Shows that the APU is running and available but not in use as a power source
10
Q
GROUND POWER AVAILABLE
A
Ground power is connected and meets quality standards
