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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
SEE A
FUEL FLOW TRANSMITTER (REF)
LINE FOR MAIN
FUEL  FUEL SUPPLY 
DISTRIBUTION 
VALVE 
SEE  B 
MAIN GEARBOX 
(REF) 
FWD 

A
Fuel Distribution Valve Installation
Figure 401 (Sheet 1)

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2. FUEL  FUEL FLOW 
VALVE DISTRIBUTION  3. BOLT  6. TRANSFER TUBE  7. PACKING  TRANSMITTER 
FLANGE  (2 LOCATIONS) 

8. GASKET J BRACKET
1. FUEL TRANSFER 5. PACKING TUBE (8 LOCATIONS)
4. WASHER
24. FUEL (4 LOCATIONS)
SUPPLY TUBE 9. BOLT
(8 LOCATIONS)
10.
 CLAMP

11. NUT

12.
 CLAMP

21. BOLT  1 (4 LOCATIONS)
20. ADAPTER FOR FUEL FLOW TRANSMITTER 13. BOLT 11. NUT (2 LOCATIONS)
14. BOLT
22. PACKING (16 LOCATIONS)
15. BRACKET BRACKET
FLANGE K  19. CLAMP
23. BOLT HOSE FOR MAIN 18. CLAMP
(4 LOCATIONS)  16. CLAMP
FUEL SUPPLY (REF) 2 9. BOLT
17. CLAMP
25. BRACKET
B
1
ENGINES PRE-PW-SB 73-164
2
ENGINES POST-PW-SB 73-164
Fuel Distribution Valve Installation Figure 401 (Sheet 2)
G21324
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 864-058-N00
 WARNING: MAKE SURE YOU OPEN THE APPLICABLE CIRCUIT BREAKERS FOR THE
_______ ENGINE IGNITION BEFORE YOU OPEN THE ENGINE CIRCUIT BREAKER FOR THE FUEL CONTROL VALVE. THE IGNITER PLUGS CAN START THE IGNITION AUTOMATICALLY IF YOU DO NOT OPEN THE CIRCUIT BREAKERS. IF THE COMBUSTION CHAMBER HAS FUEL IN IT, AN INTERNAL FIRE OR A TAILPIPE FIRE CAN OCCUR WHICH CAN CAUSE INJURY TO PERSONS AND DAMAGE TO THE ENGINE.
 (2)  
For the applicable engine, open these circuit breakers and attach the DO-NOT-CLOSE tags:

 (a)  
P6 Main Power Distribution Panel
 1) 6F01 IGN 1 ENG 1
 2) 6G19 STBY IGN ENG 1
 3) 6K19 IGN 2 ENG 1
 4) 6F02 IGN 1 ENG 2
 5) 6G20 STBY IGN ENG 2
 6) 6K20 IGN 2 ENG 2
 7) 6F03 IGN 1 ENG 3
 8) 6G21 STBY IGN ENG 3
 9) 6K21 IGN 2 ENG 3
 10) 6F04 IGN 1 ENG 4
 11) 6G22 STBY IGN ENG 4
 12) 6K22 IGN 2 ENG 4

 S 864-048-N00
 (3)  
For the applicable engine, open this circuit breaker and attach the DO-NOT-CLOSE tag:

 (a)  
P6 Main Power Distribution Panel
 1) 6L10 FUEL CONT VALVE ENG 1
 2) 6L11 FUEL CONT VALVE ENG 2
 3) 6L12 FUEL CONT VALVE ENG 3
 4) 6L13 FUEL CONT VALVE ENG 4

 (4)  
Open the right fan cowl panel (AMM 71-11-04/201).

 S 014-050-N00
 S 044-052-N00
 WARNING: DO THE THRUST REVERSER DEACTIVATION PROCEDURE TO PREVENT THE
_______ OPERATION OF THE THRUST REVERSER. THE ACCIDENTAL OPERATION OF THE THRUST REVERSER CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
 (5)  Do this procedure: Thrust Reverser Deactivation for Ground Maintenance (AMM 78-31-00/201).
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S 014-051-N00
 (6)  Open the right core cowl panel (AMM 71-11-06/201).
　
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