S 434-106

 (17)
 Install the sense line to the sense port on the precooler.

 (a)  Install the tubing clamps to hold the downstream sense line to the precooler.
 S 794-064
 (18) Do the steps that follow to make sure there are no leaks at the connections for the precooler:
 (a)  
Use the ground air to pressurize the pneumatic system (AMM 36-05-00/201).

 (b)  
Put the PACK switches to the OFF position.

 (c)  
Put the BLEED switches to the OFF position.

 (d)  
If it is necessary, open the isolation valve.

 (e)  
Do the check for leakage at the precooler connections.

 NOTE:____Diffused leakage is permitted. Jet blast leakage must be repaired.
 E. Put the Airplane to Its Usual Condition
 S 414-036
 WARNING: OBEY THE INSTRUCTIONS IN THE PROCEDURE TO CLOSE THE THRUST
_______ REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS WHEN YOU CLOSE THE THRUST REVERSERS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
 (1)  
Close the thrust reversers (AMM 78-31-00/201).

 (2)  
Close the fan cowl panels (AMM 71-11-04/201).

 S 414-042
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 S 444-037
 (3)  Do the activation procedure for the thrust reverser (AMM 78-31-00/201).
 TASK 36-12-25-004-084
 4. Bleed Air Precooler Removal (With Engine Installed)
___________________________
 A. References
 (1)  
AMM 36-11-15/401, Pressure Regulating and Shutoff Valve

 (2)  
AMM 36-12-35/401, Precooler Control Valve

 (3)  
AMM 71-11-02/201, Fan Cowl Panels

 (4)  
AMM 78-31-00/201, Thrust Reverser System

 (5)  
AMM 78-31-01/401, Fan Duct Cowl and Thrust Reverser

 B. Access
 (1)  
Location Zones
 502/503 Fan Cowls - Left Nacelle
 504/505 Thrust Reversers - Left Nacelle
 602/603 Fan Cowls - Right Nacelle
 604/605 Thrust Reversers - Right Nacelle

 (2)  
Access Panels
 5737/5837 Fan Cowl Assy
 5738/5838 Thrust Reverser Cowl Assy
 5739/5839 Thrust Reverser Cowl Assy
 5746/5846 Fan Cowl Assy

 C. Prepare to Remove the Precooler
 S 044-085
 WARNING: DO THE DEACTIVATION PROCEDURE FOR THE THRUST REVERSER TO
_______ PREVENT THE OPERATION OF THE THRUST REVERSER. ACCIDENTAL OPERATION OF THE THRUST REVERSER CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
 (1)  
Do the deactivation procedure for the thrust reverser for ground maintenance (AMM 78-31-00/201).

 (2)  
Open the fan cowl panel (AMM 71-11-02/201).

 S 014-086
 S 014-087
 WARNING: OBEY THE INSTRUCTIONS IN THE PROCEDURE TO OPEN THE THRUST
_______ REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS WHEN YOU OPEN THE THRUST REVERSERS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
 (3)  Open the thrust reversers (AMM 78-31-00/201).
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 S 034-088
 (4)  Remove the outboard thrust reverser half (AMM 78-31-01/401).
 D. Remove the Precooler (Fig. 401)
 S 034-089
 CAUTION: REMOVE THE BLEED AIR PRECOOLER FROM THE OUTBOARD SIDE OF THE
_______ ENGINE. IF YOU DO NOT REMOVE THE PRECOOLER FROM THE OUTBOARD SIDE, YOU CAN CAUSE DAMAGE TO THE LEADING EDGE OF THE WING.
 (1)  
Remove the outboard strut fire seal assembly door.

 S 034-090
　
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