(d)  
Make sure the FUEL VALVE CLOSED light on pilots' overhead panel, (P5), is on (dim) to show the valve closed.

 (e)  
Open this circuit breaker and attach a DO-NOT-CLOSE tag:

 1)  P6 Main Power Distribution Panel a) SHUTOFF VALVE ENG

 (f)
Remove the electrical power (AMM 24-22-00/201).

 1)  Set the BAT switch on the Electrical Meters Battery and Galley Power Module (P5-13) to the OFF position and install a DO-NOT-OPERATE tag.

 (g)  
Put an approved container for fuel below the drain plug for the fuel filter.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 71-00-03
 ALL  ú ú C01.1 Page 212 ú Jul 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
PBPBLANKING PLATE
2
1  ENGINES WITH PBP ELBOW ON FUEL PUMP HP HOUSING 
SEE  A  2  HOUSING PLATE ON FUEL PUMP HP ENGINES WITH PBP BLANKING 

FUEL SUPPLY LINE
SEE B INLET FUEL PUMP
PHP PORT 2
PBP ELBOW
SEE C ACCESSORY GEARBOX
MAIN ENGINE PBP PORT
CONTROL (MEC)
PLUG ON PRESSURIZING VALVE (HIDDEN BY LUBE FLOW
FUEL CONTROL BOX) SCREEN ASSEMBLY
FUEL FILTER PRESSURIZING VALVE DRAIN PLUG FUEL MANIFOLD DRAIN PLUG
SCAVENGE OIL FILTER LUBRICATION UNIT SEE D
OIL SUPPLY MAGNETIC CHIP DETECTOR
FILTER (3 PLACES)
DRAIN PLUG A
Engine Fuel and Lubrication System Preservation Connections Figure 201 (Sheet 1)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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 ALL  ú ú C03 Page 213 ú Mar 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
PCR LINE 
VBV OPEN END LINE 
VBV CLOSED END LINE 
MEC DRAIN 
SERVO 
FUEL 
HEATER  MEC 
B 
CIT SENSOR 
PB LINE 

FUEL PUMP FUEL FILTER INLET PRESSURE PORT
CDP LINE MEC
C
FUEL INLET
PRESSURE LINE

FUEL
FUEL FILTER
FILTER DIFFERENTIAL PRESSURE SWITCH
ACCESSORY
GEARBOX
D

Engine Fuel and Lubrication System Preservation ConnectionsFigure 201 (Sheet 2)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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 ALL  ú ú C01 Page 214 ú Mar 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
(h)  Remove the drain plug for the fuel filter and let the fuel drain.
 NOTE: You can loosen the connection for the fuel supply line
____ at the service disconnect panel to help the fuel drain.
 You can use a funnel, made from foil or equivalent material, below the fuel supply line connection and a hose that goes to the container to prevent fuel leakage on the fan case.
 (i)  
Remove the O-ring from the drain plug. 1) Discard the O-ring.

 (j)  
Install a new O-ring, lightly lubricated with petrolatum, on the drain plug.

 (k)  
Install the drain plug with the threads lightly lubricated with grease. 1) Tighten the drain plug to 45-55 pound-inches (5.1-6.2

 Newton meters).
 2) Safety the drain plug with a lockwire.

 (l)  
If you loosened the fuel supply line, tighten the connection for the fuel supply line at the service disconnect panel.

 (m)  
Disconnect the fuel supply line at the fuel pump inlet. 1) Remove the bolts and washers that attach the fuel supply line to the fuel pump. 2) Remove the gasket from the inlet flange of the fuel pump.

 a) Keep the gasket for the installation.
 3) Install the cap on the fuel supply line.
　
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