A. Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002).

 **ON A/C 001-049, 051-099, 101-149, 201-299,
 Subtask 38-12-00-865-059-A
 B. Make sure that this(these) circuit breaker(s) is(are) closed: -------------------------------------------------------------------------------PANEL SERVICE IDENT. LOCATION -------------------------------------------------------------------------------2000VU WATER SYS - QUANT IND 1MA B01

R **ON A/C 151-199, 301-399, 401-499,
 Subtask 38-12-00-865-059
 B. Make sure that this(these) circuit breaker(s) is(are) closed: -------------------------------------------------------------------------------PANEL SERVICE IDENT. LOCATION -------------------------------------------------------------------------------2001VU WATER SYS - QUANT IND 1MA B06
 **ON A/C ALL
 Subtask 38-12-00-010-051
 C. Get Access
 (1)
 Put the access platform in position at Zone 171.

 (2)
 Get access to the lavatories and galleys.

 (3)
 Make sure that the potable water shutoff valve in the lavatories and in the galleys is set to the OPEN position.

 Subtask 38-12-00-613-053
 D. Fill the potable water system (Ref. TASK 12-15-38-613-001).
 NOTE : Do not close the access panel 171AL.

____ Subtask 38-12-00-480-050

 E. Connect the Ground Air-Supply Cart
 (1)
 Put the ground air-supply cart in position at Zone 171.

 (2)
 Connect the ground air-supply cart to the ground air-pressure connection at the service panel 2023VU.

 4. Procedure
_________ Subtask 38-12-00-614-051
 A. Presurize the Potable Water System
 (1)
 Open the ground air-pressure charging-valve at the service panel 2023VU.

 (2)
 Operate the reducing valve of the ground air-supply cart and pressurize the potable water tank to 23 +3 -3 psi (1.5857 +0.2068 -0.2068 bar).

 Subtask 38-12-00-710-054
 B. Do this test.
 -------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. In the lavatory/galley:  In the lavatory/galley: - operate the water faucet. - water flows from the water faucet.
 5. Close-up
________ Subtask 38-12-00-080-050
 A. Disconnect the Ground Air-supply Cart
 (1)
 Close the ground air-pressure charging-valve at the service panel 2023VU.

 (2)
 Disconnect and remove the ground air-supply cart.

 1EFF : ALL 1 38-12-00Page 505 1 1 Aug 01/00R 1 1 1CES 1

 Subtask 38-12-00-410-051

 B. Close Access
 (1)
 Make sure that the work area is clean and clear of tool(s) and other items.

 (2)
 Close the access panel 171AL.

 (3) Remove the access platform(s). Subtask 38-12-00-862-052
 C. De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-002).
 1EFF : ALL 1 38-12-00Page 506 1 1 Aug 01/00R 1 1 1CES 1

 TASK 38-12-00-710-004

 Operational Test of a Potable Water Heater
 NOTE : The test of the water heater in one lavatory is given. The procedure is
____
 the same for all the other water heaters.

 1. Reason for the Job
__________________
 Self Explanatory
 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------
REFERENCE QTY DESIGNATION
 -------------------------------------------------------------------------------
R No specific 1 CART - SERVICING, WATER, POTABLE
 B. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
12-15-38-613-001 Fill the Potable Water Tank System (Aircraft Electrical Power Available) 12-24-38-680-001 Draining of the Potable Water System (with Electrical Power) 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External Power 38-10-00-614-001 Pressurization of the Potable Water System from a Ground Air Supply 38-10-00-614-002 Depressurization of the Potable Water System
 3. Job Set-up
__________
 Subtask 38-12-00-861-053
 A. Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002).

 **ON A/C 001-049, 051-099, 101-105,
　
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