79-21-00
 ALL  ú ú C01 Page 1 ú Nov 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
ACCESSORY GEARBOX
MAIN OIL/FUEL HEAT EXCHANGER
SEE C
FUEL PUMP
SCAVENGE OIL FILTER
SEE D
SEE A
TRANSFER
GEARBOX

SERVO FUEL HEATER
MEC
FWD
LUBRICATION UNIT
SEE B A
Oil Distribution System - Component LocationFigure 1 (Sheet 1)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////

SCAVENGE FORWARD SUMP TUBE SCAVENGE TUBE
FWD

LUBRICATION UNIT

Oil Distribution System - Component Location
Figure 1 (Sheet 2)

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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 ALL  ú ú C01 Page 3 ú Nov 15/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
CORE ACCESS COVER
"OIL OUT"
 TUBE 
MAIN OIL/FUEL 
HEAT EXCHANGER 

SERVO FUEL HEATER
FUEL DRAIN TUBE "OIL IN" TUBE
FWD
FUEL PUMP
MAIN OIL/FUEL HEAT EXCHANGER C
Oil Distribution System - Component Location
Figure 1 (Sheet 3)

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
OIL 
TEMPERATURE 
OIL OUTLET  BULB 
1
 FWD  OIL 
BOWL  INLET 

OIL TEMPERATURE BULB
2
SCAVENGE OIL FILTER
D
1 ENGINES WITHOUT CFMI SB 79-063
2 ENGINES WITH CFMI SB 79-063
Oil Distribution System - Component Location Figure 1 (Sheet 4)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
SEE A
ACCESSORY 
GEARBOX 
TRANSFER 
GEARBOX 
A 
MAIN OIL/FUEL 
HEAT EXCHANGER 
SERVO 
FUEL HEATER 
A 
MEC 
FUEL PUMP 
FWD 
SCAVENGE 
OIL FILTER 
LUBRICATION 
UNIT
A 
Oil Distribution System
Figure 2 (Sheet 1) 

B03546
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
END COVER
HOUSING
CORE
B
DRAIN PORT
FLANGE TO
ATTACH THE
FUEL PUMP

////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
OIL OUT TO OIL TANK
　
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