S 434-038

 (5)  
Put the flexible shroud on the APU shroud.

 (a)  Install the hose clamp.
 S 794-063
 (6)  
Do this procedure: "Pressurize the APU Shroud and Do a Check for Leaks".

 S 434-058

 (7)  
Connect the shroud drain line again.

 E. Put the Airplane Back to Its Usual Condition
 S 864-039
 (1)  
Remove the electrical power if it is not necessary
 (Ref 24-22-00/201).

 S 414-053

 (2)  
Close the access door, 3804, for the APU compartment if you did not close it before this step (Ref 12-31-00/201).

 S 414-054

 (3)  
Close the access door, 3701, for the stabilizer trim if you did not close it before this step (Ref 12-31-00/201).

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 28-22-36
 ALL  ú ú 01 Page 414 ú Mar 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 FUEL BOOST PUMP - REMOVAL/INSTALLATION
______________________________________
 1.  General
_______
 A.  This procedure has two tasks:
 (1)  
A task to remove the fuel boost pump

 (2)  
A task to install the fuel boost pump.

 B.  The procedures to remove the fuel boost pumps are the same for all of the fuel boost pumps. The procedure to install the fuel boost pump is the same for all of the boost pumps. There are two boost pumps above the bottom surface on the inboard part of each wing. There is one boost pump on the front spar on the inboard part of each wing. The No. 1 tank and the No. 2 tank are referred to as the wing tanks.
 C.  Access to the aft boost pumps for the wing tanks is through the applicable access panel for the fuel boost pump. Access to the boost pumps in the center tank is also through the applicable access panel. You must extend the leading edge flaps to get access to the forward fuel boost pumps for the main tanks (refer to the WARNING below).
 TASK 28-22-41-004-001
 2.  Fuel Boost Pump Removal
_______________________
 A.  Standard Tools and Equipment
 (1)  Container - to catch fuel
 B.  References
 (1)  
AMM 24-22-00/201, Manual Control

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

 (3)  
AMM 57-30-11/401, Boost Pump Access Door

 C.  Access
 (1)  
Location Zone
 221 Center Section Fuel Tank
 303 Left Wing Inboard Leading Edge
 305 Left Fuel Tank
 403 Right Wing Inboard Leading Edge
 405 Right Fuel Tank

 (2)  
Access Panels
 7201 Boost Pump Access Door
 7203 Boost Pump Access Door
 7401 Boost Pump Access Door
 7403 Boost Pump Access Door

 D.  Prepare to Remove the Boost Pump
 S 864-002
 (1)  
Connect the external electrical power (AMM 24-22-00/201).

 S 864-003

 (2)  
Make sure the engine shutoff valves and the crossfeed valve are in the closed position.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 28-22-41
 ALL  ú ú 01 Page 401 ú Nov 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 S 864-004
 (3)  
On the P5 panel, make sure all of the switches for the fuel boost pumps are in the OFF position.

 S 864-005

 (4)  
Open these circuit breakers and attach DO-NOT-CLOSE tags:

 (a)  P6 Main Power Distribution Panel 1) CROSSFD VALVE (for the fuel crossfeed valve) 2) SHUT-OFF VALVE ENG 1 3) SHUT-OFF VALVE ENG 2 4) The circuit breaker for the fuel boost pump that you are
 scheduled to remove.
 E. Get Access to the Forward Fuel Boost Pumps in the Wing Tanks
 S 864-059
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LE
　
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