(3)
 Install the access panel 161DW.

 (4)
 Remove the access platform(s).

 (5) Close the AFT cargo-compartment door (Ref. TASK 52-30-00-860-002). **ON A/C ALL
 Subtask 38-41-00-862-052
 B. De-energize the aircraft electrical circuits
 (Ref. TASK 24-41-00-862-002).

 1EFF : ALL 1 38-41-00Page 309 1 1 May 01/05R 1 1 1CES 1

 AIR SUPPLY SYSTEM - ADJUSTMENT/TEST
___________________________________
 TASK 38-41-00-710-001
 Operational Test of the Air Supply System (with ground air supply)
 1. Reason for the Job
__________________
 Self Explanatory
 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific ground air-supply cart
 No specific manometer
 No specific access platform 1.0 m (3 ft. 3 in.)

 B. Consumable Materials
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
No specific water
 C. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
R 12-15-38-613-001 Fill the Potable Water Tank System (Aircraft R Electrical Power Available) 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 38-10-00-614-002 Depressurization of the Potable Water System 52-30-00-860-001 Open the FWD or AFT Cargo-Compartment Door with the
 Yellow Electric Pump 52-30-00-860-002 Close the FWD or AFT Cargo-Compartment Door with the Yellow Electric Pump

 3. Job Set-up
__________

 Subtask 38-41-00-861-050
 A. Energize the aircraft electrical circuit (Ref. TASK 24-41-00-861-002). **ON A/C 001-049, 051-099, 101-149, 201-299,
 Subtask 38-41-00-010-051
 B. Get Access
 (1)
 Put the access platform in position at Zone 138.

 (2)
 Open the access panel 171AL.

 (3)
 Open the FWD cargo-compartment door (Ref. TASK 52-30-00-860-001).

 (4) Open the access panels 131PW, 131NW. R **ON A/C 151-199, 301-399, 401-499,
 Subtask 38-41-00-010-051-A
 B. Get Access
 (1)
 Put the access platform in position at Zone 171.

 (2)
 Open the access panel 171AL.

 (3)
 Open the AFT cargo-compartment door (Ref. TASK 52-30-00-860-001).

 (4)
 Open the access panel 161DW.

R **ON A/C ALL

 Subtask 38-41-00-614-053
 C. Relaese the pressure from the potable water system.
 (1)
 Turn and pull the fill and drain handle at the service panel 2023VU from the NORMAL to the FILL position.

 (2)
 Operate the water faucet in the lavatories to let air into the system.

 (3) Turn the fill and drain handle back to the NORMAL position. Subtask 38-41-00-480-050
 D. Install the test equipment.
 (1)
 Remove the blanking plug from the test port downstream of the pressure reducing and relief valve.

 (2)
 Connect a manometer 60 psi (4.1368 bar) to the test port.

 (3)
 Connect the ground air-supply cart to the ground air-pressure connection at the potable water service panel.

 Subtask 38-41-00-613-050
 E. Fill the potable water tank with water (Ref. TASK 12-15-38-613-001).

 4. Procedure
_________

 Subtask 38-41-00-710-050
 A. Do this test.
 -------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1.
 At the service panel 2023VU:

- open the high-pressure air charging-valve and pressurize the potable water tank to 15 psi (1.0342 bar).

2.
 At the service panel 2023VU:

-slowly increase the pressure at the ground air-supply cart to 44 psi (3.0336 bar).

3.
 At the service panel 2023VU:

-slowly increase the pressure at the ground air-supply cart to 59 psi (4.0679 bar).

4.
 At the service panel 2023VU:

-decrease the pressure of the ground air-supply cart back to 44 psi (3.0336 bar).
　
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