(2)
 On the potable water service-panel 2023VU:

 (a) Turn the fill and drain control handle 3254MM to the PULL TO DRAIN position. Then pull it out to the mechanical stop.

 (3)
 On the MID drain panel:

 (a) Turn the overflow control handle to the OPEN position.

 (4)
 Turn the drain control handle to the OPEN position.

 (5)
 On the FWD drain panel:

 (a) Turn the drain control handle on the drain panel to the OPEN position.
 NOTE : Water will drain from:
____
 -
the fill and drain port on the service panel 2023VU,

 -
the drain port on the MID drain panel,

 -
the drain port on the FWD drain panel.

 (6)
 When the system is drained:

 -push in and then turn the fill and drain control handle 3254MM to the NORMAL position.
 -
turn the drain control handle on the MID drain panel to the CLOSED position,

 -
turn the overflow control handle on the MID drain panel to the CLOSED position.

 -
turn the drain control handle on the FWD drain panel to the CLOSED position.

 (7)
 Disconnect the drain hose(s) from the drain port(s).

 (8)
 Clean and dry the panels with a clean cloth.

 (9)
 Install the cap on the fill and drain port of the service panel.

R **ON A/C 151-199, 301-399, 401-499,
 Subtask 12-24-38-680-053-A
 A. Drain the Potable water System
 (Ref. Fig. 201A/TASK 12-24-38-991-004-B)

 CAUTION : MAKE SURE THAT THE DRAIN VALVES ARE IN THE CLOSED POSITION IF
_______ THE BLEED AIR SYSTEM IS "ON". YOU MUST DO THIS LESS THAN 10 MIN AFTER THE FLOW OF WATER FROM THE DRAIN PORTS OF THE POTABLE WATER SYSTEM STOPS. THIS WILL PREVENT DAMAGE TO THE POTABLE WATER SYSTEM.
 (1)
 Connect the drain hoses to:

 -
the fill and drain port on the service panel,

 -
the drain port on the FWD drain panel.

 (2)
 On the potable water service-panel 2023VU:

 (a)
 Turn the fill and drain control handle 3254MM to the PULL TO DRAIN position. Then pull it out to the mechanical stop.

 (b)
 Turn the drain control handle on the FWD drain panel to the OPEN position.

 NOTE : Water will drain from:
____
 -
the fill and drain port on the service panel 2023VU:

 -
the drain port on the FWD drain panel.

 NOTE : Water will remain in the supply lines to the toilet units.
____

 (3)
 When the system is drained:

 -push in and then turn the fill and drain control handle 3254MM to the NORMAL position.
 -turn the drain control handle on the FWD drain panel to the CLOSED position.

 (4)
 Disconnect the drain hose(s) from the drain port(s).

 (5)
 Clean and dry the panels with a clean cloth.

 (6) Install the cap on the fill and drain port of the service panel. **ON A/C ALL
 5. Close-up
________
 **ON A/C 001-049, 051-099, 101-149, 201-299,

 Subtask 12-24-38-410-053
 A. Close Access
 (1)
 Make sure that the work area is clean and clear of tool(s) and other items.

 (2)
 Close the access panels 133AL, 192NB, 171AL.

 (3)
 Remove the access platform(s).

 (4)
 Remove all the ground support equipment, the maintenance equipment, the standard and special tools and all other items.

R **ON A/C 151-199, 301-399, 401-499,
 Subtask 12-24-38-410-053-A
 A. Close Access
 (1)
 Make sure that the work area is clean and clear of tool(s) and other items.

 (2)
 Close the access panels 133AL, 171AL.

 (3)
 Remove the access platform(s).

 (4)
 Remove all the ground support equipment, the maintenance equipment, the standard and special tools and all other items.

R 1EFF : 151-199, 301-399, 401-499, 1 12-24-38Page 220 1 1 Aug 01/05 1 1 1CES 1

 USE OF MANUAL (MAGNETIC) FUEL QUANTITY INDICATORS - DESCRIPTION AND OPERATION
_____________________________________________________________________________
R R  1. General_______ Manual Magnetic Indicators (MMIs) can be used to find the quantity of fuel in the tanks when the aircraft is on the ground. Electrical power is not required to operate the MMIs. 
R R R Before the MMIs are used it is necessary to find the aircraft attitude value. 
　
中國航空網 www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：A320飛機維護手冊 AMM SERVICING 2(42)