747-400 AMM 飞机维护手册 气动系统 WATER/WASTE(4)

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 12.8 fluid ounces (.38 liters) chlorine dioxide,
 1.33 ounces (37.7 grams) citric acid.
 b)  AIRPLANES WITH THREE TANKS (30 GAL CAPACITY); Mix the following amounts of chlorine dioxide with citric acid in a clean plastic container:
 19.2 fluid ounces (57.liters) chlorine dioxide,
 2.00 ounces (56.6 grams) citric acid.
 (b)  
Use a clean instrument to mix the solution fully.

 (c)  
Do not use the solution for 5 minutes (activation period).

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747-400
MAINTENANCE MANUAL

 (d)  Add water to make approximately 5 gallons (20 liters) of solution.
 S 672-008
 (3)  After 5 minutes, put the solution into the potable water system through the fill fitting at the service panel (Ref 12-14-61/301).
 NOTE: The potable water will have a bad taste (like chlorine) if
____ you use too much of the disinfectant solution
 S 672-009
 (4)  
Fill the system with potable water until water with chlorine flows from the overflow port (Ref 12-14-61/301).

 S 672-010

 (5)  
Open each faucet in the system for 15 seconds.

 S 672-011

 (6)  
Let the water stay in the system for 1 hour.

 NOTE: The water with chlorine must be removed immediately after
____ 1 hour to prevent a possible bad taste in the system.
 S 682-012
 (7)  Drain the system (Ref 12-14-61/301).
 G. Flush the Potable Water System with Clean Water.
 S 612-013
 (1)  
Fill the system (Ref 12-14-61/301) with potable water until the water flows from the overflow port.

 S 612-014

 (2)  
If full tanks are not necessary, drain the system until the necessary quantity is in the tanks (Ref 12-14-61/301).

 S 752-015

 (3)  
Do a check of the water's taste from a faucet.

 (a)  If the taste is bad, flush the system with potable water (Ref paragraph 3).

 (4)  
If applicable, install the new water filter cartridges.

 (5)  
Connect the coffeemakers that were disconnected.

 S 432-016
 S 432-017
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 TASK 38-10-60-602-055
 3.  Hot Water Flush (If it is necessary to remove chlorine taste)_______________
 A. Consumable Materials
 (1)  Hot water (140 +/- 5 degrees Fahrenheit)
 B. References
 (1)  AMM 12-14-61/301, Potable Water Tanks
 C. Access
 (1)  
Location Zone

 128  Area Below and Aft of Forward Cargo Container Compartment, Right

 (2)  
Access Panel
 191FF Access Door, Water Service

 

 D. Procedure
 S 172-056
 (1)  
Perform hot water flush.

 (a)  
Drain system and add a minimum of 100 gallons of hot water to water tanks; close fill and overflow valve (water temperature 140 +/- 5 degrees Fahrenheit).

 (b)  
Open all water system faucets until water flows through each for 15 seconds.

 (c)  
Allow system to stand for one-half hour.

 

 (2)  
Drain the system (AMM 12-14-61/301).

 (3)  
Fill the system (AMM 12-14-61/301).

 S 672-059

 (4)  
Check water from typical faucet.

 S 682-057
 S 612-058
 (a)  If taste is objectionable, repeat hot water flush and retaste.
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