36-11-85
 ALL  ú ú 01 Page 507 ú Jul 12/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 415-030 WARNING: OBEY THE INSTRUCTIONS IN THE PROCEDURE TO CLOSE THE THRUST
_______ REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.
 (2)  
Close the thrust reversers (AMM 78-31-00/201). S 415-031

 (3)  
Close the fan cowl panels (AMM 71-11-02/201). S 445-032

 (4)  
Do the activation procedure for the thrust reverser (AMM 78-31-00/201).

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 36-11-85
 ALL  ú ú 01 Page 508 ú Jul 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 HIGH STAGE REGULATOR - REMOVAL/INSTALLATION
___________________________________________
 1.  General_______
 A.  This procedure contains two tasks. The first task removes the high stage regulator. The second task installs the high stage regulator.
 B.  The high stage regulator is a pneumatic control. It gives a controlled pressure from a bleed source to the high stage valve.
 C.  The high stage regulator is found on the right side of the aft fan case at the 2 o'clock position.
 TASK 36-11-86-004-001
 2.  High Stage Regulator Removal____________________________
 A.  References
 (1)  
AMM 36-05-00/201, Pneumatic System

 (2)  
AMM 71-11-02/201, Fan Cowl Panels

 (3)  
AMM 78-31-00/201, Thrust Reverser System

 B.  Access
 (1)  
Location Zones
 101/102 Control Cabin
 502/503 Fan Cowls - Left Nacelle
 602/603 Fan Cowls - Right Nacelle

 (2)  
Access Panels
 5737/5746 Fan Cowl Assy
 5837/5846 Fan Cowl Assy

 C.  Prepare to Remove the High Stage Regulator
 S 864-002
 (1)  
Make sure the engine does not operate.

 S 864-003

 (2)  
Put the forward thrust lever in the fully rearward position and attach a DO-NOT-OPERATE tag.

 S 864-004

 (3)  
Put the start lever in the CUTOFF position and attach a DO-NOT-OPERATE tag.

 (4)
Remove the pressure from the pneumatic system (AMM 36-05-00/201).

 S 864-005
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 36-11-86
 ALL  ú ú 01 Page 401 ú Nov 12/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 S 864-030
 (5)  
Open the BLEED AIR circuit breaker on the P6 Panel and attach a DO-NOT-CLOSE tag.

 S 864-033

 (6)  
Put a DO-NOT-OPERATE tag on the BLEED switch.

 S 044-006
 WARNING: DO THE DEACTIVATION PROCEDURE FOR THE THRUST REVERSER TO
_______ PREVENT THE OPERATION OF THE THRUST REVERSER. THE ACCIDENTAL OPERATION OF THE THRUST REVERSER CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
 (7)  
Do the deactivation procedure for the thrust reverser for ground maintenance (AMM 78-31-00/201).

 S 014-034

 (8)  
Open the right fan cowl panel (AMM 71-11-02/201).

 D. Remove the High Stage Regulator (Fig. 401)
 S 034-007
 (1)  
Disconnect the sense lines (3 locations).

 S 034-024

 (2)  
Disconnect the union (4) and the O-ring from the right port.

 (a)  Discard the O-ring.
 S 034-025
 (3) Disconnect the reducer (5) and the O-ring from the left port.
　
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