S 424-015
 (5)  
Put the drain valve assy in its position.

 S 424-016

 (6)  
Install the bolts and washers for the drain valve assy.

 S 424-017

 (7)  
Install the gask-o-seal between the waste elbow tube and the drain valve assy.

 S 424-018

 (8)
Install the clamp to connect the waste elbow tube to the drain assy.

 D. Waste Drain Valve Assembly Installation Test
 S 864-019
 (1)  
Open the cap on the drain valve assembly.

 S 864-020

 (2)  
Open the cap on the rinse fitting assembly.

 NOTE: There is one rinse fitting assembly on the service panel for
____
 each waste tank.

 S 614-021
 (3)  
Connect a rinse water hose from the service equipment to the rinse fitting assembly.

 S 614-022

 (4)  
Fill the waste tank with 30 gallons to 50 gallons of water.

 S 864-023

 (5)  
Pull the handle to open the waste drain ball valve for the toilet waste tank.

 S 794-024

 (6)  
Let the water sit on the drain valve assembly for 5 minutes.

 S 794-025

 (7)
Examine the drain valve assembly and the connections for leakage.

 E. Put the Airplane Back to its Usual Condition.
 S 614-026
 (1)  Service the waste system (AMM12-17-61/301).
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 38-32-69
 ú ú 01 Page 405 ú Feb 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 747-400 MAINTENANCE MANUAL
 (2)  S 014-035Remove the DO-NOT-CLOSE tags and close these circuit breakers: (a) P415 Panel 1) 415D35, UPR DK LAV FLUSH MOTOR U-21
 (3)  S 424-029Close the door for the waste tank service panel.
 (4)  S 414-030Install the forward cargo compartment floor panel.

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 38-32-69
 ú ú 01 Page 406 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 RINSE FITTING - REMOVAL/INSTALLATION
____________________________________
 1.  General_______
 A.  This procedure includes two tasks.
 (1)  
The removal of the rinse fitting.

 (2)  
The installation of the rinse fitting.

 B.  The rinse fitting for the toilet waste tank is on the service panel at the airplane centerline below the forward cargo compartment floor.
 C.  The installation task includes a check of the rinse fitting for correct operation.
 TASK 38-32-70-004-018
 2.  Rinse Fitting Removal (Fig. 401)_____________________
 A.  References
 (1)  
AMM 12-17-61/301, Waste Tanks

 (2)  
AMM 30-71-03/401, Water Tank Rinse Fitting Heaters

 (3)  
IPC 38-32-00

 (4)  
SSM 38-32-20

 (5)  
WDM 38-32-21

 B.  Access
 (1)  
Location Zone
 124 Area Below Forward Cargo Compartment, RH

 (2)  
Access Panel
 125A Service Panel Toilet Drain

 C.  Procedure
 S 864-019
 (1)  
Service the applicable waste tank (AMM 12-17-61/301), but do not add the chemical precharge.

 S 864-020

 (2)  
Open these circuit breakers and attach DO-NOT-CLOSE tags:

 (a)  P415 Panel 1) 415D35 UPR DK LAV FLUSH MOTOR U-21

 (3)  
At the service panel, open the cap to the applicable rinse fitting.

 (4)  
Gain access to the forward cargo compartment.

 S 034-043

 (5)  
Remove the floor panel above the ball valve in the area of station 585 and RBL 5.

 S 864-021
 S 864-022
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