FUEL Flashcards
What is the purpose of the fuel breakaway valves?
Reduce fire hazards by sealing the cells and lines during a high-impact landing
What is the maximum useable capacity of internal auxiliary fuel tank?
100 gal
What, if any, is the indication that the Nitrogen Inerting Unit (NIU) has failed?
The indicator on the NIU Test Panel has three white triangles
What is the purpose of the fuel transfer system?
To allow for the transfer of fuel between the internal fuel cells and from the external auxiliary tanks to the internal fuel cells
What are the two fuel transfer modes?
Automatic and Operator Selectable
What, if any, is the indication when internal auxiliary fuel transfer is selected and fails?
The 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 is the purpose of the fuel cross feed subsystem?
To allow both engines to draw fuel from either internal fuel cell
How are the cross feed modes controlled?
By either operator via the MPD Fuel page
Why must the cross feed be in the Normal mode at all times while in flight unless executing an emergency procedure?
A malfunctioning cross feed shutoff valve could result in a single-engine flameout
During engine start, the cross feed mode for that engine is automatically set to what mode?
AFT
What, if any, is the indication that a cross feed valve did not go to the commanded position?
The Caution XFEED# VALVE FAIL will be displayed
What is the purpose of the fuel quantity subsystem?
To measure remaining fuel and detect low levels in the internal fuel cells
How is remaining fuel quantity displayed?
Pounds for each fuel cell and total pounds of internal fuel remaining
When is the AFT FUEL LOW Caution message displayed?
When the AFT fuel cell quantity drops below 260 lb
What, if any, is the indication when the internal auxiliary tank is empty?
The Advisory CTR TANK EMPTY will be displayed. White āEā on center of the tank icon
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 internal fuel cell
What does the boost pump thermal relief valve do?
Relieves pressure buildup caused by heat expansion of the fuel in the fuel lines
During normal flight operation, is the fuel boost pump on or off?
Off
What, if any, is the indication that the boost pump has failed?
The Caution BOOST PUMP FAIL will be displayed on the EUFD
What is the purpose of the auxiliary power unit (APU) fuel subsystem?
To provide fuel to the APU
What is the fuel source for the APU?
AFT fuel cell
What is the power source for the APU fuel boost pump?
24-28 VDC Electrical
During normal flight operations, is the fuel boost pump on or off?
Off
What, if any, is the indication that the APU fuel shutoff valve has failed?
The Advisory APU FUEL VALVE will be displayed on the EUFD
What is the purpose of the refuel subsystem?
To allow for pressurized and gravity refueling of the aircraft
What is the maximum fueling pressure for gravity refueling?
15 PSI
What is the maximum fueling pressure for single-point adapter pressure refueling?
55 PSI
What precaution regarding radio transmissions during hot refueling must be observed?
Radio transmission will be limited to emergencies only
What Warning is associated with gravity refueling?
Use extreme care 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 push button is pressed and the XFEED 1 VALVE Caution is displayed on the Enhanced Up-Front Display (EUFD)?
The engine 1 cross feed shutoff valve failed to close
