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747-400 MAINTENANCE MANUAL
 (8)  S 035-026Loosen the captive screws on the VTO adjustment card switch bracket (Fig. 501).
 (9)  S 035-027Move the switch bracket to get to the adjustment screws.
 S 825-023

 (10) Turn the VTO adjustment card RES 3 potentiometer until the VTO SET value shown on the auxiliary EICAS agrees with the value written on the VTO decal.
 NOTE: The VTO potentiometers are 20 turns from each end of the
____ range. If you turn the potentiometer through the end of the range, the VTO will go to 98% of the tank capacity. Turn the potentiometer 5 turns in one of the two directions to get the VTO in the tank capacity limits.
 S 825-009
 (11)
 Do the procedure for the VTO adjustment card RES 2 potentiometer, again.

 S 865-010

 (12)
 Push the CDU LSK adjacent to the OTHER TANKS.

 S 865-024

 (13)
 Push the CDU LSK adjacent to the TANK 1/TANK 4.

 S 825-011

 (14)
 Turn the VTO adjustment card MAIN 4 potentiometer until the VTO SET value shown on the auxiliary EICAS agrees with the value written on the VTO decal.

 S 825-012

 (15)
 Do the procedure for the VTO adjustment card MAIN 1 potentiometer, again.

 S 865-013

 (16)
 Push the CDU LSK adjacent to the OTHER TANKS.

 S 865-014

 (17)
 Puth the CDU LSK adjacent to the TANK 2/TANK 3.

 S 825-015

 (18)
 Turn the VTO adjustment card MAIN 3 potentiometer until the VTO SET value shown on the auxiliary EICAS agrees with the value written on the VTO decal.

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747-400 MAINTENANCE MANUAL
 S 825-016
 (19)
 Do the procedure for the VTO adjustment card MAIN 2 potentiometer, again.

 S 865-017

 (20)
 Push the CDU LSK adjacent to the OTHER TANKS.

 S 865-018

 (21)
 Push the CDU LSK adjacent to the CTR/STAB

 S 825-019

 (22)
 Turn the VTO adjustment card CTR potentiometer until the VTO SET value shown on the auxiliary EICAS agrees with the value written on the VTO decal.

 F.
Put the Airplane to Its Usual Condition

 S 435-028
 (1)  
Install the switch bracket with the two captive screws on the VTO adjustment card (Fig. 501).

 S 415-020

 (2)  
Close the hinged door on the FQPU.

 (3)  
Close the electronics access door, 125B.

 S 865-022

 (4)  
Remove the electrical power if it is not necessary
 (AMM 24-22-00/201).

 S 415-021
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747-400
MAINTENANCE MANUAL

FUEL QUANTITY
PROCESSOR UNIT

SEE A
ACCESS DOOR 125B 
WINDOW 
E6 RACK 
FWD 
BSEE REFUEL VALVE ADJUSTMENT VTO CARD RELAY CARD (REF) CARDS (REF) QUANTITY CHANNEL INDIVIDUAL FUEL INPUT/OUTPUT CARDS (REF)  FWD  DOOR HINGED 
FUEL QUANTITY PROCESSOR UNIT (HINGED DOOR CLOSED) 
A 
DOOR HINGED  VTO ADJUSTMENT M2 CWT M3 M4 M1 R3 SCREWS SPARE R2 SPARE  SWITCH VTO OVERRIDE SWITCH BRACKET 
(HINGED DOOR OPEN) FUEL QUANTITY PROCESSOR UNIT  VTO ADJUSTMENT CARD 
A  B 

Refuel Valve Relay Card
Figure 501

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