UPS Boeing 747-400 fuel system

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Author:
Lanceav8r
ID:
92200
Filename:
UPS Boeing 747-400 fuel system
Updated:
2011-06-27 19:31:25
Tags:
UPS Boeing fuel system
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Description:
UPS Boeing 747-400 fuel system
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  1. Fuel Tank Quantities (LBS)
    Total Fuel Quantity
    Center Wing Tank
    Main Tanks 2 and 3 (each)
    Main Tanks 1 and 4 (each)
    Reserve Tanks (each)
    • Total 359,000
    • Center Wing Tank 115,000
    • Main Tanks 2 and 3 (each) 84,000
    • Main Tanks 1 and 4 (each) 29,000
    • Reserve Tanks (each) 8,800
  2. Main Tank 2 and 3

    60,000

    40,000

    20,000
    60,000 Scavenge Pumps in Center Wing Tank scavenge fuel to tanks 2 and 3

    40,000 Reserve tanks gravity feed to main tanks 2 and 3

    20,000 During jettison only...tanks 1 and 4 gravity feed into Main Tanks 2 and 3 until Tanks 1 and 4 reach 7000lbs.
  3. Center Wing Tank

    >
    17,000

    <17,000

    7,000

    4,000

    3,000
    >17,000 Both Center Wing Tank switches must be ON for taxi, takeoff or climb.

    <17,000 Both Center Wing Tank switches must be OFF for taxi, takeoff or climb.

    7,000 FUEL LOW CTR L and or R EICAS message illuminates during climb...Turn OFF CWT pumps.

    4,000 FUEL OVD CTR L and or R EICAS message illuminates during cruise...Turn ON CWT pumps.

    3,000 FUEL LOW CTR L and or R EICAS message. Turn OFF CWT pumps. Scavenge pumps will scavenge remaining fuel into tanks 2 and 3.
  4. Stand Pipe Level

    Main tanks 1,2,3,4

    Each

    Combined
    7,000 lbs standpipe level.

    28,000 combined.
  5. FUEL IMBALANCE

    Outboard tanks 1 and 4 >inboard tanks 2 and 3 (after reaching FUEL TANK/ENG EICAS)

    Between tanks 2 and 3

    Between tanks 1 and 4
    6,000-- Outboard tanks 1 and 4 >inboard tanks 2 and 3 (after reaching FUEL TANK/ENG EICAS)

    6,000--Between tanks 2 and 3

    6,000--Between tanks 1 and 4
  6. FUEL DISAGREE

    FMS message on progress page 2
    Fuel totalizer and calculated values disagree by 9,000 lbs or more. May indicate a fuel leak.
  7. FUEL QTY LOW
    EICAS message
    FUEL QTY LOW EICAS

    2,000 or less in Main Tanks 1,2,3 or 4
  8. FUEL TEMP LOW
    EICAS message
    Fuel temp -37ºc or less

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