(5)  
Use the keel beam access hole on the left side of the keel beam to remove the valve.

 (a)  
Turn the valve until the flanges are in the horizontal position.

 (b)  
Move the valve out with the actuator attached.

 S 424-029
 (6)  Put covers on the openings for the ducts and valve to keep unwanted objects out.
 TASK 36-11-25-404-009
 3.  Bleed Air Isolation Valve Installation (Fig. 401)______________________________________
 A. References
 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AMM 36-05-00/201, Pneumatic System

 B. Access
 (1)  Location Zones
 212/214 Air Conditioning Equipment Bay
 215 Keel Beam

 C. Install the Valve
 S 164-010
 (1)  Make sure the bonding surface of the valve is clean.
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 (2)  S 034-030Remove the covers from the ducts and valve.
 (3)  S 424-011Put the valve through the keel beam access hole on the left side of the keel beam. (a) You can monitor the valve installation from the right side of the keel beam. (b) Put the valve between the ducts until the flow arrow points to the right side. (c) Turn the valve until it is in the approximate position shown in Fig. 401.
 (4)  S 414-012Tighten the duct clamps to 45 to 50 pound inches.
 (5)  S 164-013Make sure the bonding surface for the bonding strap is clean.
 (6)  S 434-014Install the bonding strap.
 (7)  S 434-015Install the electrical connector for the valve.
 (8)  S 424-034Install the air conditioning duct section.
 (9)  S 864-016Remove the DO-NOT-CLOSE tag and close the circuit breaker for the BLEED AIR ISOLATION VALVE on the P6-4 panel.
 S 864-017

 (10)
 Supply electrical power (AMM 24-22-00/201).

 S 864-018

 (11)
 Put the switch for the isolation valve to the OPEN position.

 (a) Make sure the isolation valve opens.
 S 864-019
 (12) Put the switch for the isolation valve to the CLOSE position.
 (a) Make sure the isolation valve closes.
 S 864-020
 (13)
 Pressurize the pneumatic system (AMM 36-05-00/201).

 S 864-021

 (14)
 Make sure the two pack switches are in the OFF position.

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 S 864-022
 (15) Put the switch for the isolation valve to the OPEN position.
 (a)  Do a check for leakage at the duct clamps for the isolation valve. 1) Diffused leakage is permitted, jet blast leakage must be
 repaired.
 D. Put the Airplane To Its Usual Condition
 S 864-024
 (1)  
Remove the pressure from the pneumatic system if it is not necessary (AMM 36-05-00/201).

 S 864-023

 (2)  
Remove the electrical power if it is not necessary (AMM
 24-22-00/201).

 (3)  
Close the access doors of the air conditioning equipment bay.

 S 414-025
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 5TH-STAGE BLEED AIR CHECK VALVE - REMOVAL/INSTALLATION
______________________________________________________
 1.  General_______
 A.  This procedure contains two tasks. The first task removes the 5th-stage bleed air check valve. The second task installs the 5th stage bleed air check valve.
　
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