(2)
Container, 1-quart capacity - suitable for draining boost pump

 (3)
Plywood sheet, approximately 48 x 24 x 1/2 inch

 B.  
References

 (1)
AMM 24-22-00/201, Manual Control

 (2)
AMM 27-81-00/201, Leading Edge Flap System

 (3)
AMM 32-00-30/201, Landing Gear Door Locks

 (4)
AIPC 28-22-03, Fig. 5

 (5)
SSM 28-22-03, 28-22-04

 (6)
WDM 28-22-31, WDM 28-22-32, WDM 28-22-33, WDM 28-22-34

 C.  
Access

 (1)  
Location Zones 541 Inbd Main Tank (Part), Front Spar to Mid Spar, Left 544 Inbd Main Tank (Part), Mid Spar to Rear Spar, Left 545 Inbd Main Tank (Part), Mid Spar to Rear Spar, Left 641 Inbd Main Tank (Part), Front Spar to Mid Spar, Right 644 Inbd Main Tank (Part), Mid Spar to Rear Spar, Right 645 Inbd Main Tank (Part), Mid Spar to Rear Spar, Right

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A
747-400
MAINTENANCE MANUAL

 (2)  
Access Panels
 545CB Boost Pump Access Door
 545DB Boost Pump Access Door
 645CB Boost Pump Access Door
 645DB Boost Pump Access Door

 D.
Prepare for the Removal

 S 014-002
 (1)  
If you replace the forward boost pumps in the No. 1 or No. 4 main tank, remove the applicable boost pump access door, 545CB or 645CB.

 S 014-003

 (2)  
If you replace the aft boost pumps in the No. 1 or No. 4 main tank, remove the applicable boost pump access door, 545DB or 645DB.

 S 494-154

 (3)  
If you are to replace the No. 2 or 3 forward boost pumps do these steps:

 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE
_______ LEADING EDGE AND TRAILING EDGE FLAPS AND FLAP DRIVE MECHANISMS BEFORE YOU MOVE THE FLAP CONTROL LEVER. WITH HYDRAULIC POWER REMOVED, THE FLAPS WILL MOVE AUTOMATICALLY BY ELECTRICAL POWER WHEN YOU MOVE THE FLAP CONTROL LEVER.
 (a)  Extend the inboard leading edge flaps (AMM 27-81-00/201).
 WARNING: DO THE PROCEDURE IN AMM 27-81-00/201 TO INSTALL THE LOCKS.
_______ THE FLAPS CAN MOVE QUICKLY AND CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (b)  Install the safety locks on leading edge flaps (AMM 27-81-00/201).
 CAUTION: PUT A PLYWOOD SHEET OR EQUIVALENT ABOVE THE PRESSURE
_______ RELIEF PANEL ON THE WING INBOARD LEADING EDGE BEFORE YOU REMOVE OR INSTALL THE BOOST PUMP. DAMAGE TO THE PRESSURE RELIEF PANEL COULD OCCUR IF THERE IS NO PROTECTION.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 (c)  Put a plywood sheet above the pressure relief panel on the inboard leading edge.
 S 494-155
 (4)  
If you are to replace the No. 2 or 3 aft boost pumps, do these steps:

 (a)  
Make sure the landing gear ground locks are installed.

 WARNING: USE THE PROCEDURE IN AMM 32-00-30/201 TO INSTALL THE DOOR
_______ LOCKS. THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (b)  Install the wing and body gear door locks (AMM 32-00-30/201).
 S 864-009
 (5)  
Open the applicable circuit breakers and attach DO-NOT-CLOSE tags:

 (a)  
P180, DC Power Distribution Panel
 1) 180E4, FUEL BOOST PMP CONT AFT 1 & FWD 4
 2) 180E19, FUEL BOOST PMP CONT FWD 1 & AFT 4
 3) 180H4, FUEL BOOST PMP CONT AFT 2 & FWD 3
 4) 180H19, FUEL BOOST PMP CONT FWD 2 & AFT 3

 (b)  
P414 Power Distribution Center - Left
 1) 414B5, FUEL BOOST PUMP MAIN AFT 1
 2) 414R18, FUEL BOOST PUMP MAIN AFT 2
 3) 414J5, FUEL BOOST PUMP MAIN FWD 3
 4) 414A8, FUEL BOOST PUMP MAIN FWD 4

 (c)  
P415, Power Distribution Center - Right
　
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