(D1210)DOWNSTREAM
SENSE LINE
TO BLEED AIR  ELECTRICAL
REGULATOR  CONNECTOR (D1208)
3
PRSOV BRACKET
1.
 CLAMP

2.
 BOLT

3.
 WASHER

5. CLAMP 2 (2 LOCATIONS)
6.
 BOLT

7. BOLT
8.
 WASHER

8. WASHER (2 LOCATIONS) FWD
A
1 ENGINES WITHOUT CAPTIVE FASTENER CLAMPS
2 ENGINES WITH CAPTIVE FASTENER CLAMPS
3 ENGINES WITH DOWNSTREAM SENSE LINE TO BLEED AIR REGULATOR
Electrical Disconnects on the Engine Core Area
Figure 403

C80951
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
Prepare For the Removal of the Power Plant
__________________________________________
 Engine Core Disconnects on the Right Side

 S 034-222-C00
 (2)  Prepare to disconnect the PRSOV from the right side as follows (Fig. 404):
 NOTE:____Do not remove the PRSOV at this time. It is easier to
 remove the PRSOV after the engine is lowered on to the
 transportation stand.

 WARNING: DO NOT REMOVE THE DUCT COUPLINGS IF THE PNEUMATIC SYSTEM
_______
 HAS PRESSURE. SEVERE INJURY TO PERSONS AND EQUIPMENT
 DAMAGE CAN OCCUR.

 (a)  
If not already done, release the pressure from the pneumatic
 system (AMM 36-05-00/201).

 (b)  
Disconnect the 11/16-inch fitting on the pressure sense hose at the precooler control valve.

 CAUTION: MAKE SURE YOU INSTALL CAPS ON THE PRESSURE SENSE HOSE
_______ AND PORT. IF YOU DO NOT INSTALL THE CAPS, CONTAMINATION CAN OCCUR.
 1)  Install caps on the sense hose and the precooler control valve port.
 (c)  Disconnect the pneumatic overtemperature sense hose from the
 right side of the PRSOV as follows:

 NOTE: You do not have to remove the floating clamps on the
____ pneumatic overtemperature sense hose to remove the engine.
 1)  ENGINES WITH THE WELDED SADDLE CLAMP; Remove the clamps (10), bolts (7), washers (8) and nuts (9) that attach the overtemperature sense hose and the fire-extinquishing hose to the location adjacent to the thrust reverser bumper stop.
 2)  ENGINES WITH THE WELDED 'P-CLAMP'; Remove the clamp (10), bolt (7), washer (8) and nut (9) that attach the overtemperature sense hose and the fire-extinquishing hose to the location adjacent to the thrust reverser bumper stop.
 3)  Remove the clamp (1), washer (2) and nut (3) that attach the sense hose to the 5th-stage duct.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
1 
SEE  A  FAN AIR DUCT  4. CLAMP 5. WASHER 6. NUT 
SENSE LINE PRESSURE 
PRECOOLER CONTROL VALVE  2  EXTINGUISHING FIRE HOSE 
PRECOOLER 
PRSOV BRACKET  QUARTER-TURN FASTENER CLAMP WITH 
3 AIR REGULATOR LINE TO BLEED DOWNSTREAM SENSE  SEE  B  BUMPER STOP 
OVERTEMPERATURE PNEUMATIC SENSE HOSE 
5TH-STAGE DUCT 
1. CLAMP 2. WASHER 3. NUT 
BLEED AIR REGULATOR CONTROL LINE TO  A  PRSOV  FWD 
3 1 2  ENGINES WITH DOWNSTREAM SENSE LINE TO BLEED AIR REGULATOR ENGINES WITHOUT QUARTER-TURN CLAMP ENGINES WITH QUARTER-TURN CLAMP 

Pneumatic Disconnects on the Engine Core Area - Right Side
Figure 404 (Sheet 1)

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