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 B.  The toilet flush timer is found in the lavatory compartment behind and below the flush handle.
 TASK 38-32-61-014-001
 2.  Toilet Flush Timer Removal (Fig. 401)__________________________
 A.  Access
 (1)  Location Zone 224 Upper Deck Crew Rest Body Sta 385 to 632, Right
 B.  Procedure
 S 864-002
 (1)  Open this circuit breaker on P415 Power Distribution Panel - Right and attach a DO-NOT-CLOSE tag:
 (a)  415D35 UPR DK LAV FLUSH MOTOR U-21
 S 014-003
 (2)  
Open the latches at the bottom of the toilet shroud.

 S 014-004

 (3)  
Remove the toilet shroud.

 (4)  
Disconnect the electrical connectors from the toilet flush timer.

 S 024-007

 (5)  
Use a knife to remove the sealant from the screw that holds the bonding jumper.

 (6)  
Remove the mounting screws and washers from the toilet flush timer.

 S 024-006
 S 024-015
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

FLUSH SWITCH (REF)
TIMER
SEE A
TOILET SHROUD
LATCHES
PANEL ABOVE
THE TOILET MOUNTING WASHER AND SCREW (4 LOCATIONS)
SEALANT (ABOVE THE SCREW THAT HOLDS THE ELECTRICAL CONNECTORS FROM
BONDING JUMPER) THE TOILET FLUSH MOTOR AND ELECTRICAL POWER
BONDING JUMPERSOURCE FOR THE LAVATORY
A

Toilet Flush Timer Installation
Figure 401

C81466
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 024-008
 (7)  
Remove the bonding jumper.

 S 024-016

 (8)  
Remove the toilet flush timer.

 TASK 38-32-61-404-009
 3.  Toilet Flush Timer Installation (Fig. 401)_______________________________
 A. Consumable Materials
 (1)  A00247 Sealant - BMS 5-95, Type B
 B. Reference
 (1)  AMM 24-22-00/201, Manual Control
 C. Access
 (1)  Location Zone 224 Upper Deck Crew Rest Body Sta 385 to 632, Right
 D. Procedure
 S 424-010
 (1)  
Put the toilet flush timer in its position.

 S 424-009

 (2)  
Put the bonding jumper in its position.

 S 424-017

 (3)  
Install the mounting screws and washers.

 S 424-011

 (4)  
Apply BMS 5-95 sealant over the mounting screw that holds the bonding jumper.

 S 424-018

 (5)
Connect the electrical connectors to the toilet flush timer.

 S 414-013

 (6)  
Carefully put the toilet shroud over the toilet tank assembly and engage the latches.

 S 864-014

 (7)  
Remove the DO-NOT-CLOSE tag and close this circuit breaker on P415 Power Distribution Panel - Right:

 (a)  415D35 UPR DK LAV FLUSH MOTOR U-21

 (8)  
Supply electrical power (AMM 24-22-00/201).

 S 714-016

 (9)  
Turn the flush handle and make sure that the toilet flushes correctly.

 S 864-015
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 864-017
 (10) Remove the electrical power if it is not necessary (AMM 24-22-00/201).
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