Tests Flashcards
How are the fuel tanks normally vented?
The tanks are vented by vent lines in the collector tanks
Where is the aircraft fuel stored?
In the 2 main tanks and 1 center tank
How are the fuel system faults annunciated?
Switch lights on the overhead fuel panel
On EICAS in the form of messages
What is used to provide the fuel system computer with fuel quantity
Information:
6 fuel quantity probes with compensator units in each main tanks
3 probes in the center tank
What type of ejector pumps are used to move fuel from the main tanks to the collector tanks?
Scavenger ejectors
What maintains fuel symmetry between the main tanks?
Automatically controlled by the Bi-Directional X flow pump
How are the collector tanks kept full?
Gravity feed lines and scavenge ejectors
What is used to back up the main ejectors?
2 electric boost pumps
The electric fuel boost pumps….
Are energized during engine start
Can feed fuel to either engine from one collector tank
Back to the main ejector pumps
From what source is APU fuel feed supplied?
From the left collector tank via APU fuel pump
Where is the bulk temperature taken?
Right main tank
How is pressure refueling and suction defueling accomplished and how is it controlled?
Accomplished through the single point refuel/defuel adapter. Controlled from the refuel/defuel control panel
If a fuel asymmetry condition exists between the two tanks, what visual caution message is presented in EICAS?
FUEL IMBALANCE
What fuel system information is displayed on the EICAS Primary page?
Individual tank quantities, total fuel quantity, fuel used quantity
For automatic pressure refueling, what does the refuel/defuel control panel permit?
Preselection of fuel quantity desired
Built in test (BITE) feature
Refuel/defuel shut-off valves to close automatically if the maximum fuel level is reached
The engine driven and APU generators are rated at?
40 KVA
The main aircraft generators supply power to ______ AC buses?
4
Power for the 28 VDC is supplied by:
TRU’s
The APU battery is:
24 volts rated at 43 amp/hours
The main battery is:
24 volts 17 amp/hrs
TRU’s supply power to ______ DC buses:
4
Cranking power for starting the APU is provided by:
APU battery
The ADG supplies AC power to:
3B hydraulic pump
ESS AC bus
Slats/flaps and pitch trim
STAB CH2
The main and APU batteries are kept in charged condition by battery chargers powered by:
AC BUS No. 1
AC Service Bus