(2)  
Remove the pressure regulator and shutoff valve (PRSOV)
 (AMM 36-11-15/401).

 S 034-091

 (3)  
Remove the coupling between the precooler exhaust port and the interface for the bleed air duct at the nacelle strut firewall.

 S 034-092

 (4)  
Remove the precooler control valve (AMM 36-12-35/401).

 S 014-093

 (5)  
Disconnect the sense line from the precooler (disconnect the sense line from the same side as the exhaust).

 S 034-094

 (6)  
Remove the supports for the sense line and wire bundle from the precooler.

 (a)  Move the sense line and wire bundle away from the precooler.
 S 034-096
 (7)  Remove the fasteners which hold the lower support rods to the lower support link.
 NOTE: When you remove the fasteners for the removal of the
____ precooler, make sure you monitor the fastener buildup for the installation procedure.
 S 034-097
 (8)  Remove the fasteners which hold the precooler by the lugs to the forward adjustable link assembly.
 NOTE: When you remove the fasteners for the removal of the
____ precooler, make sure you monitor the fastener buildup for the installation procedure.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A 737-300/400/500MAINTENANCE MANUAL
 S 034-098
 (9)  Remove the fasteners which hold the upper aft side of the precooler to the nacelle strut structure.
 NOTE: When you remove the fasteners for the removal of the
____ precooler, make sure you monitor the fastener buildup for the installation procedure.
 S 024-099
 (10)
 Remove the precooler.

 S 214-100

 (11)
 Make sure there is no unwanted material or damage to the fan air side of the precooler.

 (a)  
Remove the unwanted material if it is necessary.

 (b)  
Replace the precooler if it is damaged.

 TASK 36-12-25-404-066
 5. Bleed Air Precooler Installation (With Engine Installed)
________________________________
 A. Consumable Material
 (1)  
Fire Sealant - BMS 5-63 (20-30-11/201)

 (2)  
D00006 - Antiseize Compound, NEVER SEEZ (AMM 20-30-21/201)

 B. References
 (1)  
AMM 20-10-44/401, Lockwire

 (2)  
AMM 20-30-11/201, Adhesives, Cements and Sealers

 (3)  
AMM 20-30-21/201, Lubricants

 (4)  
AMM 36-05-00/201, Pneumatic System

 (5)  
AMM 36-11-15/401, Pressure Regulating and Shutoff Valve

 (6)  
AMM 36-12-35/401, Precooler Control Valve

 (7)  
AMM 71-11-04/201, Fan Cowl Panels

 (8)  
AMM 78-31-00/201, Thrust Reverser System

 (9)  
AMM 78-31-01/401, Fan Duct Cowl and Thrust Reverser

 C. 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

 D. Install the Precooler
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737-300/400/500MAINTENANCE MANUAL
 S 964-067
 WARNING:_______ DO NOT USE FORCE ON THE CONNECTIONS FOR THE DUCT FLANGE.  IF IT
 IS NECESSARY FOR THE INSTALLATION, LOOSEN THE CLAMPS OF THE
 BLEED SYSTEM.  IF YOU USE FORCE ON THE CONNECTIONS, YOU CAN

 CAUSE DAMAGE TO THE DUCTS.
 (1)  
Install a new E-seal on the exhaust port flange of the bleed air precooler.
　
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