C. Connect toilet service cart.
NOTE: On airplanes with OPEN/CLOSED levers, If a Y-fitting equipped with T-handle (Roylyn part number 2651-133) is connected between service cart and drain outlet, ensure T-handle is fully extended to avoid interference with flapper valve at drain outlet.
(1)
On airplanes with drain plug in drain line and Y-fitting on waste drain hose:
(a)
Connect flush line and waste drain hose.
(b)
Remove drain plug with T-handle on Y-fitting. 1) Push T-handle in to engage end of rod with mating part in drain line plug. 2) Rotate T-handle counterclockwise until drain line plug releases. 3) Full T-handle outward until it stops.
(2)
On airplanes with drain plug in drain line and waste drain hose with no Y-fitting:
(a)
Remove drain plug with drain plug wrench.
(b)
Connect flush line and waste drain hose.
(3)
On airplanes without drain plug connect flush line and waste drain hose.
(4)
On airplanes with OPEN/CLOSED levers:
(a)
Connect flush line and waste drain hose.
(b)
Rotate OPEN lever 1/4 turn CCW to open flapper valve.
D. Pull out waste drain valve handle and turn handle to lock in extended (open) position, allowing waste to drain into toilet service cart.
NOTE: For best drain line flushing action, drain toilet tanks one at a time.
E. Close drain valve by releasing the valve handle and pump a minimum of 6 gallons of water through flush line to flush the toilet system.
F. As water continues to enter through the flush line, pull and release the drain valve handle several times to clear the valve face and the valve seat.
G. Discontinue flushing and lock drain valve handle in the extended (pulled) position to open the waste drain valve and completely drain the tank.
H. Release the toilet drain handle to close the waste drain valve.
NOTE: Allow the toilet drain handle to snap into the closed position to assure a watertight seal at the tank drain valve. Maintenance personnel may choose at this point to charge toilets and check for possible leakage of drain valve.
5E3 Jun 20/92 12-17-0 Page 202A/202B BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
A43511
505 Toilet Service Panels Jun 20/92 Figure 201 (Sheet 1) 12-17-0 Page 202C/202D BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
5E3 Toilet Service Panels
Oct 20/86 Figure 201 (Sheet 2) BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 12-17-0 Page 203
I. On airplanes without OPEN/CLOSE levers, Install drain plug (if so equipped) and disconnect toilet service cart as follows.
(1)
On airplanes with drain plug and with Y-fitting on waste drain hose:
(a)
Push in T-handle as far as possible while rotating handle slightly counterclockwise to reduce friction between drain plug and drain tube wall.
(b)
While holding T-handle in the innermost position, rotate the handle clockwise to lock the drain plug in position.
(c)
Continue to rotate the T-handle clockwise; use additional force to expand the drain plug against the drain tube wall until the force yields as the locking device goes overcenter.
CAUTION: UNLESS YIELD IS FELT, PLUG IS NOT PROPERLY LOCKED.
(d)
Pull T-handle out to disengage from drain plug.
CAUTION: IF COUPLING HANDLE DOES NOT DISENGAGE EASILY, THE DRAIN PLUG IS NOT PROPERLY LOCKED IN POSITION. REPEAT DRAIN PLUG REMOVAL AND REINSERTION STEPS UNTIL PLUG IS PROPERLY LOCKED.
(e)
Disconnect flush line and waste drain hose.
(2)
On airplanes with drain plug and with no Y-fitting on drain hose:
(a) Disconnect flush line and waste drain hose.
NOTE: Maintenance personnel may choose at this point to charge toilets per step
3.J. and check for possible leakage of drain valve.
(b) Install drain plug with drain plug wrench. 1) Mount waste drain plug on drain plug wrench: 2) Insert waste drain plug into drain tube until plug is firmly seated against
shoulder; rotate plug slightly counterclockwise to aid in properly seating plug.
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