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 D.  The tank unit contains two different types of mounting brackets to ease installation. The upper bracket is fixed on the outer tube and should be the first bracket attached to airplane structure. The lower bracket can be adjusted up and down or rotated to align with structure.
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747-400
MAINTENANCE MANUAL

Fuel Quantity Indicating System - Component Location
Figure 1 (Sheet 1)

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747-400
MAINTENANCE MANUAL

EICAS MAINTENANCE PAGE

Fuel Quantity Indicating System - Component Location
Figure 1 (Sheet 2)

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B50984
A
747-400
MAINTENANCE MANUAL

ACCESS DOORFUEL QUANTITY PROCESSOR UNIT
SEE C
E6 RACK 
INPUT/OUTPUT  FWD 
CARDS (REF)  B 
VTO 
ADJUSTMENT CARD  REFUEL VALVE  INDIVIDUAL FUEL  WINDOW 
SEE  C1  RELAY CARD  QUANTITY CHANNEL (IFQC) CARDS 

Y5CA013 Y5CA2Y5CA3
Y5CA4
Y5CA5Y5CA6Y5CA7
Y5CA8Y5CA9Y5CA10
LED INDICATOR LIGHT HINGED DOOR
FWD
DOOR HINGED  FUEL QUANTITY PROCESSOR UNIT (HINGED DOOR CLOSED) 
C 

FUEL QUANTITY PROCESSOR UNIT (HINGED DOOR OPEN)
C
CARD  EQUIPMENT NUMBER
IOC A (1) PRIMARY Y5CA002 IOC B (2) SECONDARY Y5CA003 IFQC RESERVE 2 Y5CA004 IFQC MAIN 1 Y5CA005 IFQC MAIN 2 Y5CA006 IFQC CENTER Y5CA007 IFQC MAIN 3 Y5CA008 IFQC MAIN 4 Y5CA009 IFQC RESERVE 3 Y5CA010 REFUEL VLV RELAY CARD Y5CA013 VTO ADJUSTMENT VTO OVERRIDESCREWS SWITCH
R3 M4 M3 CWT M2 M1 R2 SPARE
SWITCH SPARE
BRACKET
VTO ADJUSTMENT CARD
C1

Fuel Quantity Indicating System Component Location
Figure 1 (Sheet 3)

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MAINTENANCE MANUAL

REFUELING CONTROL PANEL
SEE E
D
TEST  POWER 
GAGES  SYS  OVERFILL  VALVE POSITION/CONTROL (MANUAL) 
BATT 
OPEN 
CLOSED 
R  L  I  O  NORM 
RESET  CENTER  MAIN 2  MAIN 1  RESERVE 2 
TOTAL FUEL 
156.2  45.0  38.0  13.6  4.0 
ACTUAL 
PRESELECT  38.0  13.6  4.0 
TOTAL  CTR 
SELECT QTY  MAIN 3  MAIN 4  RESERVE 3 
OPEN 
CLOSED  1  6  3  2  I  O 
ALL VALVES  OPEN 
PRESELECT 
CONTROL  QTY x 1000  CLOSED 
FUELING 
QUANTITY 
INDICATOR 
E 

Fuel Quantity Indicating System Component Location
Figure 1 (Sheet 4)

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