36-11-15
 ALL  ú ú 01 Page 419 ú Mar 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 BLEED AIR REGULATOR - REMOVAL/INSTALLATION
__________________________________________
 1.  General_______
 A.  This procedure contains two tasks. The first task removes the bleed air regulator. The second task installs the bleed air regulator.
 B.  The bleed air regulator is a pneumatic controller. It combines the control pressure with the electrically operated shutoff from a bleed air source to the pressure regulating and shutoff valve (PRSOV).
 C.  The bleed air regulator is mounted to the engine inner extension ring, below the high-stage regulator on the right side.
 TASK 36-11-16-004-001
 2.  Bleed Air Regulator Removal___________________________
 A.  References
 (1)  
AMM 36-05-00/201, Pneumatic System

 (2)  
AMM 71-11-04/201, 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
 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 Bleed Air Regulator
 S 864-002
 (1)  
Make sure the applicable engine is not in operation.

 S 864-003

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

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 36-11-16
 ALL  ú ú 01 Page 401 ú Jul 15/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 S 864-004
 (3)  
Put the start lever in the CUTOFF position and attach a
 DO-NOT-OPERATE tag.

 S 864-005

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

 S 864-006

 (5)  
Open the applicable circuit breaker for the bleed air control on the P6 panel and attach a DO-NOT-CLOSE tag.

 S 864-007

 (6)  
Attach a DO-NOT-CLOSE tag to the applicable BLEED switch.

 S 864-039
 WARNING: DO THE DEACTIVATION PROCEDURE TO PREVENT THE OPERATION OF THE
_______ THRUST REVERSERS. THE ACCIDENTAL OPERATION OF THE THRUST REVERSER CAN CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
 (7)  
Do the deactivation procedure for the thrust reverser for ground maintenance (AMM 78-31-00/201).

 S 014-008

 (8)  
Open the fan cowl panels (AMM 71-11-04/201).

 S 014-009
 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.
 (9)  Open the thrust reversers (AMM 78-31-00/201).
 D. Remove the Bleed Air Regulator (Fig. 401)
 S 034-011
 (1)  
Disconnect the electrical connector.

 (2)  
Disconnect the sense lines.

 S 034-015

 (3)  
Loosen and remove the reducer(s) and the union(s) from the regulator ports.

 S 034-012
 (a)  Discard the O-rings.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 36-11-16
 ALL  ú ú 01 Page 402 ú Jul 15/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 034-016
 (4)  
Loosen and remove the bolts and the washers (4 locations) which connect the regulator to the mounting pad of the extension ring.
　
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