(a)  
Make sure the status page shows on the auxiliary EICAS.

 (b)  
Make sure the applicable FUEL SPAR VLV ENG 1, 2, 3, or 4 status message does not show.

___
 S 864-005-N00
 (4)  
For the applicable engine, open this circuit breaker and install the DO-NOT-CLOSE tag:

 (a)  
P6 Main Power Distribution Panel
 1) 6G1 FUEL SHUTOFF VALVE ENG 1
 2) 6G2 FUEL SHUTOFF VALVE ENG 2
 3) 6G3 FUEL SHUTOFF VALVE ENG 3
 4) 6G4 FUEL SHUTOFF VALVE ENG 4

 S 864-006-N00
 (5)  
Open these circuit breakers as follows and install the DO-NOT-CLOSE tags:

 (a)  
P7 Overhead Circuit Breaker Panel
 1) 7F9 EIU L
 2) 7F10 EIU C
 3) 7F15 EIU R

 S 864-007-N00
 (6)  
Remove electrical power if it is not necessary (AMM 24-22-00/201).

 S 014-028-N00

 (7)  
Open the right fan cowl panel (AMM 71-11-04/201).

 S 044-036-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.
 (8)  Do this procedure: Thrust Reverser Deactivation for Ground Maintenance (AMM 78-31-00/201).
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 014-029-N00
 (9)  Open the right core cowl panel (AMM 71-11-06/201).
 S 014-037-N00
 WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00/201 WHEN YOU OPEN THE
_______ THRUST REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
 (10)
 Open the right thrust reverser (AMM 78-31-00/201).

 F.
Remove the Differential Pressure Switch

 S 684-009-N00
 (1)  
Drain the fuel from the fuel filter housing.

 (a)  
Put the container below the drain plug for the fuel filter.

 (b)  
Remove the drain plug.
 1) Let the fuel drain into the container.
 2) Discard the packing on the drain plug.

 (c)  
Lubricate the new packing with the petrolatum.

 (d)  
Install the new packing on the drain plug.

 (e)  
Lubricate the threads of the drain plug with engine oil.

 (f)  
Install the drain plug in the cover for the fuel filter housing. 1) Tighten the drain plug to 45-55 pound-inches (5.1-6.2

 newton-meters). 2) Install the lockwire to the drain plug.
 S 034-010-N00
 (2)  
Disconnect the electrical connector DS1585 from the differential pressure switch.

 (a)  
Install the protection caps on the open ends of the electrical connectors.

 S 034-025-N00
 (3)  
Remove four bolts and two washers which attach the differential pressure switch and bracket to the fuel pump.

 S 024-012-N00

 (4)  
Remove the differential pressure switch from the fuel pump.

 (a)  
Discard the packings.

 S 034-013-N00
 (5)  Install the protection cap on the open ports in the fuel pump and the differential pressure switch.
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TASK 73-34-01-404-014-N00
 3. Install the Fuel Filter Differential Pressure Switch (Fig. 401)
____________________________________________________
 A. Consumable Materials
 (1)  
D00390 Oil - Engine

 (2)  
D00250 Petrolatum White, VV-P-236

 B.
　
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