Elec Flashcards
How many main generator?
3
Any 1 generator has sufficient capacity to supply all essential flight loads. True or False?
True
When the right engine starts and APU is off, Which systems are powered by the IDG?
Both right and left main buses
Both ext power is ON. Then Apu is ON. Which will happen?
Left main bus start to be powered by APU.
You have unpowered airplane.
Battery bus powered
Power is removed from which items when the battery switch is pushed off?
Left AIMS, Cpt displays and CDU , Standby Instruments bus
What ground handling bus powers?
Cargo doors, cargo compartment lights and maintenance access lights.
Ground service bus powers
Cabin lights and outlets, Main and Apu battery chargers, LEft forward Fuel pump
What the Cabin utility powers?
utilities such as
How many batteries ?
How many TRU ? Where they supply energy?
What if TRU failure happens?
- APU and Main
- L and R main DC bus , Cpt anf F/O Flt Inst. Bus
Bus tie brakers automatically feed other system
Back up generator source time limit?
Non-time limited source.
What is the power source of flight controls?
PMG (Permenant Magnet Generators)
What if the PMG fails?
DC buses supply energy to flight controls. If it is also fails hot battery bus feeds and addition to them one minute battery is at the each 3 of FCDC bus
What is the electrical configuration during Autoland?
3 independant sources. Right back up generator will be in use too
What is the primary source of DC power during normal operation?
What provides DC power on this airplane?
TRU
What is primary power source for fly-by-wire system?
Permenant Magnet Generators
With no external power available, how can you power the ground handling bus after engine shutdown?
Start the APU
Synoptics are not available in the airplane in standby mode. True or False?
True
Only 1 backup generator at a time can power the transfer buses. True or False ?
True
Autoland is possible with 1 main generator and 1 back up generator operating. True or False?
True.
What is this EICAS message indicates?
q
a
APU cooldown period?
105 sec
What is this EICAS means?
EICAS
Reason
Loss of all generators, APU switches ON automatically even the switch in OFF position. True or False?
True
Test
