(2)
At aft service panel, position drain nipple with flapper valve open/close levers up.
E. Install mounting bolts.
(1)
Install nut ring from behind service panel.
(2)
Dip bolts in sealant.
(3)
Install bolts while sealant is still wet.
F. Install clamp to secure waste drain duct to drain nipple.
NOTE: To ease clamp installation, a minimum of one wrap of teflon tape can be installed to waste drain duct clamping point. Check existing tape and replace if necessary.
G. For forward service panel, install aft access door on right inner wall of nose wheel well.
H. For aft service panel, install aft cargo compartment aft bulkhead lining panel.
I. Close flapper valve in waste tank drain nipple.
(1)
Rotate CLOSE lever in direction of CLOSED arrow (toward drain nipple centerline) and hold lever in closed position.
(2)
Move OPEN lever slightly in opposite direction of OPEN arrow (away from drain nipple centerline) to lock flapper valve in closed position, then release both levers.
J. Close the following circuit breaker and remove DO-NOT-CLOSE identifier:
(1) DRAIN HEATER
K. Test Drain Fitting Heating Gasket Installation.
(1)
Provide electrical power (Ref 24-22-00).
(2)
Check that gasket is warming up.
(3)
Close drain service door.
(4)
Remove electrical power if no longer required.
L. Add flushing compound to waste tank (Ref 12-17-0).
500
Feb 20/89 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 30-71-21 Page 403
