Fuel quantities Flashcards
Reserve tank capacity
4.0 T
Main Tank 1/4 capacity
13.3 T
Main Tank 2/3 capacity
38.1 T
CWT capacity
52.2 T
27,200
When main tanks 2 or 3 @ 27,200 kgs, CWT fuel is scavenged via 4 jet pumps into Main tanks 2 & 3.
18,200
When main tanks 2 or 3 @ 18,200 kgs, Reserve x-feed valves open and fuel is gravity fed to Main 2 & 3.
9,072
During Fuel Jettison, when main tanks 2 or 3 levels reach 9,072 then main tanks 1 & 4 transfer valves open and gravity feed into main tanks 2 & 3.
7,700
Center wing tank quantity less than 7,700 kgs before start with pump switches ON
3,200 (CWT)
FUEL LOW CTR L, R - Center wing tank quantity approximately 3,200 kgs in climb with pump switches ON
1,300
Center wing tank quantity approximately 1,300 kgs in cruise with pump switches ON
3,200
Standpipe level in main Tanks during override and jettison operation.
2,720 (both kinds)
FUEL IMBALANCE 2-3
Fuel difference of 2,720 between main tanks 2 & 3. Message no longer displayed when difference is less than 450 kgs
FUEL IMBALANCE
After reaching FUEL TANK/ENG condition, there is a longitudinal fuel imbalanceof 2,720 kgs between inboard main tanks and outboard main plus reserve tanks. Message no longer displayed when difference less than 450 kgs
1,360
Fuel difference of 1,360 between main tanks 1 & 4. Message no longer displayed when difference less than 450 kgs.
2,300/6,800/900
When CWT quantity drops below 2,300 kgs and total fuel consumption is greater than 6,800 kgs per hour, the CWT override/jettison pumps can no longer provide full override of the outboard main tank pumps. As a result, a shared flow situation between the CWT and outboard main tanks is established. During this shared flow situation, approximately 900 kgs of fuel are consumed from each outboard main tank prior to display of the EICAS message FUEL LOW CTR
450
Fuel IMBAL EICAS on primary message no longer displayed when difference is less than 450 kgs
