(b)  
Pressurize the Pneumatic System with APU.

 (c)  
Pressurize the Pneumatic System with one or more engines.

 (11)
 Make sure the flow is normal at the lavatory faucet.

 S 714-023
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 S 794-024
 (12)
 Make sure there are no air leaks at the connections that were installed in the steps above.

 S 864-025

 (13)
 For the ceiling panels that were removed, do this task:  "Forward Cargo Container Compartment Ceiling and Sidewall Linings -Installation" (AMM 25-52-01/401).

 S 864-026

 (14)
 Do this task: "Water System Pressurization" (AMM 38-15-60/201).

 S 864-027

 (15)
 If pneumatic power is not necessary, do this task:  "Release the Pressure in the Pneumatic System (AMM 36-00-00/201).

 S 864-028

 (16)
 Remove electrical power is it is not necessary (AMM 24-22-00/201).

 TASK 38-15-65-004-029
 4.  Unloader Check Valve Removal (Fig. 401)____________________________
 A. References
 (1)  
AMM 25-52-01/401, Containerized Cargo Compartment Ceiling and Sidewall Linings

 (2)  
AMM 38-15-60/201, Water System Pressurization

 B. Access
 (1)  Location Zone 124 Forward Cargo Container Compartment Aft Half, Right
 C. Procedure
 S 864-030
 WARNING: MAKE SURE YOU REMOVE THE AIR PRESSURE FROM THE WATER
_______ PRESSURIZATION SYSTEM BEFORE YOU START TO REMOVE THE UNLOADER CHECK VALVE. AIR WITH HIGH PRESSURE AND TEMPERATURE CAN CAUSE INJURY TO PERSONS.
 (1)  
Do this task: "Water System Depressurization" (AMM 38-15-60/201).

 S 014-031

 (2)  
Do the "Containerized Cargo Compartment Ceiling and Sidewall Linings Removal" task (AMM 25-52-01/401) to remove the upper 12 inches of the RH vertical sidewall panels between stations 840 and 860.

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 S 014-032
 (3)  
Do the "Containerized Cargo Compartment Ceiling and Sidewall Linings Removal" task (AMM 25-52-01/401) to remove the ceiling panels adjacent to the sidewall panels that you removed.

 S 014-050

 (4)  
Find the 1/2-inch diameter airline that connects to the compressor to the unloader check valve.

 S 034-051

 (5)  
Remove the clamp that holds the 1/2-inch diameter air line to the floor beam at RBL 92.

 S 034-033

 (6)  
Remove the clamshell clamp from the coupling on the inlet side of the unloader check valve.

 S 034-034

 (7)  
Move the sleeve away from the unloader check valve.

 S 034-035

 (8)  
Remove the adapter from the inlet side of the unloader check valve.

 S 024-036

 (9)  
Remove the unloader check valve.

 S 034-037

 (10)
 Remove and discard the O-rings.

 TASK 38-15-65-404-038
 5.  Unloader Check Valve (Fig. 401)____________________
 A. Consumable Materials
 (1)  D00463 Lubricant - White Protopet 1S (Witco Corp, New York, NY 07804)
 B. References
 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AMM 25-52-01/401, Containerized Cargo Compartment Ceiling and Sidewall linings.

 (3)  
AMM 38-15-60/201, Water System Pressurization

 C. Access
 (1)  Location Zone 124 Forward Cargo Container Compartment Aft Half, Right
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