S 614-003

 (2)  
Drain and flush the waste tank (AMM 12-17-61/301).

 NOTE: Make sure the drain lines are fully drained.
____ Do not add the chemical precharge after you do the task to drain and flush the waste tanks.
 S 014-032
 (3)
Open these circuit breakers and attach DO-NOT-CLOSE tags:

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

 (4)  
At the service panel, open the cap to the applicable rinse fitting.

 (5)  
Gain access to the forward cargo compartment.

 S 014-034

 (6)  
Remove the floor panel above the ball valve in the area of stations 585 and RBL 5.

 S 014-033
 S 014-004
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A

747-400
MAINTENANCE MANUAL

UPPER DECK LAVATORY
SEE A
TOILET DRAIN LINE
FORWARD CARGO COMPARTMENT
STA 580
RINSE 
LINE 
FWD 
OUTBD 
TOILET WASTE 
WASTE DRAIN  SERVICE PANEL 
VALVE ASSEMBLY 
INSTALLATION 
SEE  B 
A 

Waste Drain Valve Assembly Installation
Figure 401 (Sheet 1)

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K62010
A
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MAINTENANCE MANUAL

(8 LOCATIONS)
WASTE DRAIN VALVE ASSEMBLY

Waste Drain Valve Assembly Installation
Figure 401 (Sheet 2)

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MAINTENANCE MANUAL

 S 024-006
 (7)  
Remove the clamp to disconnect the waste elbow tube from the drain valve assy.

 S 024-007

 (8)  
Remove the gask-o-seal between the waste elbow tube from the drain valve assy.

 S 024-008

 (9)  
Remove the bolts and washers from the drain valve assy.

 S 024-009

 (10)
 Remove the drain valve assy.

 S 024-010

 (11)
 Remove the heating gasket from the drain valve assembly or the waste tank service panel.(AMM 30-71-05/401)

 TASK 38-32-69-404-011
 3. Waste Drain Valve Installation (Fig. 401)
______________________________
 A. References
 (1)  
AMM 12-17-61/301, Waste Tank Servicing

 (2)  
AMM 30-71-05/401 Waste Tank Drain Fitting Gasket Heater

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

 (2)  
Access Panels
 125A Waste Tank Service Panel

 C. Waste Drain Valve Installation
 S 414-031
 (1)  
Install heating gasket (AMM 30-71-05/401)

 S 424-012

 (2)  
Apply a fay surface seal with sealant, BMS5-95, Type I to both sides of the toilet drain gasket.

 (3)
Install the toilet drain gasket to the waste tank service panel.

 S 424-014

 (4)  
Apply a fay surface seal with sealant, BMS5-95, Type I to the drain valve assy.

 S 424-013
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