Fuel Flashcards
What is the capacity of the internal auxiliary fuel cell?
100 Gallons
What is the purpose of the NIU?
Oxygen depleted air to the airspace tanks
What indication is displayed on the MPD when the internal auxiliary tank is empty?
White “E” will be displayed and message on UFS in advisory column.
Same will apply for Wing tanks.
Fuel quantity subsystem measures fuel remaining in the?
Internal fuel cells, BOTH FWD/AFT
When the fuel boost pump is on where does it pull fuel from?
AFT tank
To prevent damage to the pressurized fuel system, do not exceed a max fuel pressure of?
55 PSI
What warning is associated with the gravity filler port?
“…To preclude venting of fuel overboard through the filler neck”
What is the total capacity of the FWD and AFT cells combined?
376 GAL
What power source is used to operate the bi-directional fuel transfer pump?
IPAS air or bleed air
When is the FWD fuel low message displayed?
At 240LBS
The fuel boost pump is automatically turned on or off by the MP during engine start but it can also be turned on or off from what MPD page?
Fuel page
What is the purpose of the fuel cell breakaway valve?
Reduces fire hazards by sealing the cells and lines during high impact landings
Capacity of the forward cell?
156 gallons
Capacity of the aft cell?
220 gallons
What, if any, is the indication that the Nitrogen Inerting Unit (NIU) has failed?
Three white triangles on NIU test panel
What are the two fuel transfer modes?
Automatic and operator selectable
What is the purpose of the fuel crossfeed subsystem?
To allow both engines to draw fuel from either internal fuel cell
Why must the crossfeed be in the Normal mode at all times while in flight unless executing an emergency procedure?
A malfunctioning crossfeed shutoff valve could result in a single engine flameout
During engine start, the crossfeed mode for that engine is automatically set to what mode?
AFT (that’s where the boost pump is)
What is the purpose of the fuel quantity subsystem?
To measure remaining fuel and detect low levels in the internal cells
When is the FWD FUEL LOW Caution message displayed?
Fwd cell drops below 240 lb
When is the AFT FUEL LOW Caution message displayed?
After fuel drops below 260 lb
What is the purpose of the Fuel Boost Subsystem?
To provide pressurized fuel during engine start and when selected by operator.
When the boost pump is on, where does it draw its fuel?
Aft interior fuel cell
During normal operation, is the fuel boost pump on or off?
Off
What does the boost pump thermal relief valve do?
Relieves pressure buildup caused by heat expansion of the fuel in fuel lines
What is the purpose of the refuel subsystem?
Allow for pressurized and gravity refueling of AC
What is the maximum fueling pressure for gravity refueling?
15 psi
What is the maximum fueling pressure for closed circuit and single-point adapter pressure refueling?
55 PSI
What Warning is associated with gravity refueling?
Use extreme caution when venting the fuel cell to preclude venting fuel out of the filler neck.
What is the purpose of the Fuel Management page?
To provide displays of fuel system status and the means to control the operation of the fuel system
What is the purpose of the SFR display on the TSD page?
To determine power settings for optimum fuel economy during cruise flight
What is indicated when the Fire Detect/Extinguish panel ENG 1 FIRE illuminated pushbutton is pressed and the XFEED 1 VALVE FAIL Caution is displayed on the Enhanced Up-Front Display (EUFD)?
The engine 1 cross feed shutoff valve failed to close
What color will the fuel cells be in n the fuel page when a fuel low caution comes on?
Yellow
What happens on the fuel page when an auxiliary tank is empty?
E will show at the center of the auxiliary tank in the fuel page in white
What, if any, is the indication when internal auxiliary fuel transfer is selected and fails?
Advisory - CTR XFER FAIL will be displayed on EUFD
What, if any, is the indication when the fuel transfer pump fails?
The caution FUEL XFER FAIL will be displayed on EUFD
What, if any, is the indication that a crossfeed valve did not go to the commanded position?
Caution - XFEED# VALVE FAIL will be displayed
What, if any, is the indication that the boost pump has failed?
Caution - BOOST PUMP FAIL will be displayed on the EUFD
During normal operation, is the fuel boost pump on or off?
Off
