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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
(b)
Put 4.5 U.S. gallons of water into the toilet tank.
(c)
Disconnect the flush line.
(d)
Flush the amount of chemical precharge that is necessary to treat a 13 gallon tank down the toilet.
H. Put the Airplane Back to Its Usual Condition.
S 863-014
(1)
Close the rinse fitting cap.
S 213-015
(2)
Make sure that the drain valve assembly has no leakage.
S 863-016
(3)
Close the outer cap on the drain valve assembly.
S 143-017
(4)
Clean and dry all the service panel components and the door.
S 863-018
(5)
Close the door on the service panel.