(2)  
AMM 24-22-00/201, Manual Control

 B.  Access
 (1)  
Location Zones
 203 Nose Wheel Well
 208 Forward Cargo Compartment
 218 Aft Cargo Compartment

 (2)  
Access Panels
 1104 Forward Toilet Panel
 1502 Toilet Service Door
 3105R Forward Nose Wheel Well Panel

 C.  Prepare to Remove the Drain Nipple
 S 864-002
 (1)  
Supply electrical power (AMM 24-22-00/201).

 S 614-003

 (2)  
Do the servicing for the applicable waste tank (AMM 12-17-00/301).

 (a)  
Do not add the flushing chemical to the waste tank.

 (b)  
Let the service door stay open.

 S 864-004
 (3)  Open this circuit breaker on the load control center, P18, and attach a DO-NOT-CLOSE tag:
 (a)  DRAIN HEATER
 D.  Remove the Drain Nipple
 S 014-006
 (1)  Do these steps to get access to the clamp which holds the drain nipple to the drain duct:
 (a)  
For the forward service panel, remove the access door on the right inner wall of the nose wheel well.

 (b)  
For the aft service panel, remove the aft bulkhead lining panel in the aft cargo compartment.

 S 014-005
 (2)  Remove the clamp which holds the waste drain duct to the drain nipple.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 034-007
 (3)  
Pull the handle on the waste drain cap to open the cap.

 S 014-020

 (4)
Remove the mounting bolts from the drain nipple (8 locations).

 (a)  
Remove 7 of the bolts. 1) Keep one of the bolts loosley attached.

 (b)  
From behind the service panel, hold the nut ring.

 (c)  
Remove the last bolt and the nut ring which is attached with rivets to the pan.

 S 024-008
 (5)  Remove the drain nipple from the service panel.
 NOTE: Be careful you do not cause damage to the heater gasket.
____
 (a)  Remove the heater gasket if it is damaged. 1) Cut the wires near the heater gasket.
 NOTE: Keep the wires in position to help locate the
____ splice. Remove these wires before you install the new heater gasket.
 2) Remove the heater gasket.
 TASK 38-32-81-404-021
 3. Drain Duct Nipple Installation (Fig. 401)
______________________________
 A. Consumable Materials
 (1)  
A00246 Sealant - Chromate Type, BMS 5-95 (AMM 20-30-11/201)

 (2)  
B00148 Solvent - Spec TT-M-261 or JIS-K-8903 methyl ethyl ketone (AMM 20-30-31/201)

 (3)  
G00150 Tape - Teflon, Permacel P-424 (AMM 20-30-51/201)

 B. References
 (1)  
AMM 12-17-00/301, Toilet - Servicing

 (2)  
AMM 20-30-11/201, Adhesives, Cements, and Sealers

 (3)  
AMM 20-30-31/201, Cleaners and Polishes

 (4)  
AMM 20-30-51/201, Miscellaneous Materials

 (5)  
AMM 24-22-00/201, Manual Control

 C. Access
 (1)  Location Zones
 203 Nose Wheel Well
 208 Forward Cargo Compartment
 218 Aft Cargo Compartment

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 38-32-81
 ALL  ú ú 01 Page 402 ú Nov 15/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL 
PANEL AFT SERVICE SEE A  MOUNTING BOLT (8 LOCATIONS)  DRAIN CAP FOR THE WASTE TANK

FORWARD 
SERVICE 
PANEL 
DRAIN CAP  SEE  A 
　
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