Electrical Flashcards
List the AC sources for Electrical power?
-2 IDGS
-APU Generator
-RAT
-AC ground power Cart
-Inverter
What are DC power sources?
2 lead acid sealed DC Batteries
3 TRUS
Which power source has priority, APU or GPU?
APU
System Logic provides Electrical power for the aircraft following source priority:
RAGO
Respective IDG
APU
GPU
Opposite IDG
In What circumstances would we use a DC GPU?
For APU starts if battery 2 is unavailable
What does the amber light next to IDG mean?
That IDG must be shutdown
What would cause the amber light next to IDG to come on?
HOTLOP
High temps or low pressure
annunciator test
If an IDG is disconnected, can it be maually connected by the pilots on the ground or in flight?
no, maintenence must do it
Can One IDG power the whole electrical system?
Yes
Can the APU fully replace Failed IDG?
Yes
What will charge Batteries?
Any AC source
What Items are on the Hot Battery Bus?
Engine fire extinguishers
Fuel shutoff Valve
HYD SOV
Dome Lights
Oil level Indication
refueling panel
water service panel
Why does Battery 1 have on, but not AUTO?
Battery 1 does not require automation for APU start.
Why does Battery 2 have an AUTO selection?
To power the APU start bus
regarding the APU Battery 1 supplies _______ with power and Battery 2 supplies_____________.
Battery 1- Fadec
Battery 2- APU Start bus
What is the Voltage of battery?
24 V
Below what voltage would batteries need to be charged?
22V
Below what voltage would Mx be required to service the batteries?
21V
When would the RAT Deploy Automatically?
When AC Buses are not powered
During an Electrical Emergency, how long will battery supply power if the RAT does not deploy?
10 mins
What is available during an electrical emergency?
DU 2&3, CCD1, MCDU 2, audio panels, clock, IESS and compass backlight.
When electrical load increases beyond the system what happens?
Load shedding
what are the speeds to remember for RAT?
150KT MIN. DEPLOY
130KT MIN FOR POWER
