1.
 Reason for the Job

__________________
 Self Explanatory

 2.
 Job Set-up Information

______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific 1 ACCESS PLATFORM 2M (6 FT)
 No specific 1 CART - SERVICING, WATER, POTABLE

 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
12-31-38-660-001 Cold Weather Maintenance - Water/Waste 12-33-21-618-001 Pre-conditioning through the LP Ground Connection
 **ON A/C 001-049, 051-099, 101-149, 201-299,
 12-15-38-991-002 Fig. 302 R **ON A/C 151-199, 301-399, 401-499,
 12-15-38-991-002-A Fig. 302A **ON A/C ALL

 3. Job Set-up
__________
 Subtask 12-15-38-618-051

 A. Preparation to Fill the Potable Water System
 (1)
 Obey the cold weather maintenance procedure (Ref. TASK 12-31-38-660-001).

 (2)
 If the temperature in the aircraft is below 4 DEG.C (39.20 DEG.F) do the pre-conditioning procedure (Ref. TASK 12-33-21-618-001).

 **ON A/C 001-049, 051-099, 101-149, 201-299,
 Subtask 12-15-38-010-051
 B. Open for Access
 (1)
 Put the ACCESS PLATFORM 2M (6 FT) in position.

 (2)
 Open the access panel 171AL.

 (3)
 Open the POTABLE WATER FILL AND DRAIN port on the service panel 2023VU.

 (4) Open the access panel 192NB. R **ON A/C 151-199, 301-399, 401-499,
 Subtask 12-15-38-010-051-A
 B. Open for Access
 (1)
 Put the ACCESS PLATFORM 2M (6 FT) in position.

 (2)
 Open the access panel 171AL.

 (3)
 Open the POTABLE WATER FILL AND DRAIN port on the service panel 2023VU.

 **ON A/C ALL
 4. Procedure
_________
 **ON A/C 001-049, 051-099, 101-149, 201-299,

 (Ref. Fig. 302/TASK 12-15-38-991-002) R **ON A/C 151-199, 301-399, 401-499,
 (Ref. Fig. 302A/TASK 12-15-38-991-002-A)
 **ON A/C 001-049, 051-099, 101-149, 201-299,

 Subtask 12-15-38-613-052
 A. Fill the Potable Water System CAUTION : THE WATER PRESSURE MUST NOT BE MORE THAN 3.45 BARS (50.0 PSI) A
_______ PRESSURE MORE THAN 3.45 BARS (50.0 PSI) CAN CAUSE DAMAGE.
 (1)
 Connect the fill hose of the CART - SERVICING, WATER, POTABLE to the POTABLE WATER FILL AND DRAIN port.

 (2)
 On the service panel 191NB:

 -turn the TANK OVERFLOW handle to the OPEN position.

 (3)
 On the service panel 2023VU:

 -turn the FILL/DRAIN handle to the PULL TO FILL position,
 -then pull it out to the mechanical stop.

 (4)
 Operate the water service vehicle and fill the potable water tank until water comes from the TANK OVERFLOW port.

 (5)
 Stop the water service vehicle.

 (6)
 Push in and then turn the FILL AND DRAIN handle to the NORMAL position.

 (7)
 Disconnect the hose of the water service vehicle from the fill and drain port.

 (8)
 Turn the TANK OVERFLOW handle to the CLOSE position.

 Potable water Service-Panel 2023VU
 Figure 302/TASK 12-15-38-991-002

R 1EFF : 001-049, 051-099, 101-149, 201-299, 1 12-15-38Page 313 1 1 May 01/05 1 1 1CES 1

 Potable Water Service-Panel 2023VU
 Figure 302A/TASK 12-15-38-991-002-A

R 1EFF : 151-199, 301-399, 401-499, 1 12-15-38Page 314 1 1 Aug 01/05 1 1 1CES 1

 (9) Clean and dry the overflow port and the adjacent area.

 (10)
 Visually examine the connections for leaks. Leaks are not permitted.

 (11)
 Close the fill and drain port on the service panel. NOTE : If the servicing is done in cold weather conditions, the FILL

____ AND DRAIN port should be left open as long as possible to drain the residual water from the fill and drain line.
R **ON A/C 151-199, 301-399, 401-499,
 Subtask 12-15-38-613-052-A
 A. Fill the Potable Water System CAUTION : THE WATER PRESSURE MUST NOT BE MORE THAN 3.45 BARS (50.0 PSI) A
_______ PRESSURE MORE THAN 3.45 BARS (50.0 PSI) CAN CAUSE DAMAGE.
 (1)
　
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