OPERATIONS MANUAL

Fuel System
EICAS Messages:
>FUEL AUX ()
>FUEL IMBAL 1-4
>FUEL IMBAL 2-3
>FUEL IMBALANCE
>FUEL JETT ()
>FUEL LO STAB L
>FUEL LO STAB R
>FUEL LOW CTR ()
FUEL OVRD () AFT
FUEL OVRD () FWD
PRESS
LIGHT
PRESS
LIGHT
PRESS
LIGHT
PRESS
LIGHT
PRESS
LIGHT
PRESS
LIGHT
ADVISORY MESSAGES
auxiliary tank transfer switch (L or R) is on
AND auxiliary tank quantity below 230 kg (500 lb)
difference greater than 1360 kg (3000 lb) between
main tanks 1 and 4
[message disappears when difference decreases
below 450 kg (1000 lb)]
difference greater than 2720 kg (6000 lb) between
main tanks 2 and 3
[message disappears when difference decreases
below 450 kg (1000 lb)]
difference greater than 1360 kg (3000 lb) between
inboard and outboard main tanks after reaching
tank-to-engine condition
[message disappears when difference decreases
below 450 kg (1000 lb)]
jettison system (A or B) inoperative
left stabilizer tank pump switch on
AND stabilizer tank at critical limit
[critical limit is 3600 kg (8000 lb) when pitch is
above 5°, else 1200 kg (2600 lb)]
right stabilizer tank pump switch on
AND stabilizer tank at critical limit
[critical limit is 3600 kg (8000 lb) when pitch is
above 5°, else 600 kg (1300 lb)]
center tank pump (L or R) running
AND center tank at critical limit
[critical limit is 7700 kg (17000 lb) when on ground,
else 3200 kg (7000 lb) when pitch is above 5°,
else 1300 kg (3000 lb)]
aft override pump (2 or 3) low pressure when
commanded on OR pump switched off while main
tank quantities not equal
forward override pump (2 or 3) low pressure when
commanded on OR pump switched off while main
tank quantities not equal
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