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F58705
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
4. FORWARD SUMP AIR FLOW TEST
A. DISCONNECT TGB OIL SUPPLY TUBE FROM TGB AND FORWARD OIL SUPPLY EXTERNAL TUBE. PLUG NIPPLE ON
FORWARD SUMP OIL SUPPLY EXTERNAL TUBE.

B. CONNECT THE TEST RIG AIR SUPPLY HOSE EQUIPPED WITH ADAPTER, 856A3267, TO FORWARD OIL TUBE
ASSEMBLY AT THE CONNECTION OF FORWARD BEARING SUPPLY HOSE TO THE LUBRICATION UNIT. TIGHTEN
THE ADAPTER TO 225-275 POUND-INCHES (25-31 N.m)

C. MEASURE THE AIR FLOW RATE.
D. DISCONNECT THE TEST RIG AIR SUPPLY HOSE.
E. CONNECT THE OIL TUBES.
F. TIGHTEN THE OIL SUPPLY TUBE COUPLING NUT TO 135-150 POUND INCHES (15.5-17 N.m).
G. TIGHTEN THE FORWARD OIL SUPPLY EXTERNAL TUBE COUPLING NUT TO 225-275 POUND INCHES (25-31 N.m).

S-M56-MM-03394-00-B
Engine Oil Circuit Air Flow Check Figure 116 (Sheet 4)
F58725
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
TGB OIL FLANGE J  FLANGE K

B

S-M56-MM-03395-00-B
Engine Oil Circuit Air Flow Check Figure 116 (Sheet 5)
F58737
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
LUBRICATION UNIT
FORWARD SUMP OIL SUPPLY HOSE
OIL SUPPLY TUBE
C
S-M56-MM-03396-00-B
Engine Oil Circuit Air Flow Check Figure 116 (Sheet 6)
F58739
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
5. TGB AIR FLOW TEST
A. ON THE TGB, AT 9 O'CLOCK AFT LOOKING FORWARD, REMOVE THE TGB OIL SUPPLY TUBE.
____FOR FORWARD SUMP TEST, THIS TUBE HAS ALREADY BEEN DISCONNECTED FROM FORWARD OIL SUPPLY
NOTE:
EXTERNAL AIR TUBE.

B. CONNECT THE TEST RIG AIR SUPPLY HOSE TO THE TGB CONNECTION.
C. MEASURE THE AIR FLOW RATE.
D. DISCONNECT THE TEST RIG AIR SUPPLY HOSE.
E. CONNECT THE TGB OIL SUPPLY TUBE
(1) TIGHTEN THE COUPLING NUTS TO 283 POUND-INCHES (32 N.m)

TGB OIL
TGB CONNECTION

PLUG HERE

D
S-M56-MM-03397-00-B
Engine Oil Circuit Air Flow Check Figure 116 (Sheet 7)
F58731
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
6. AGB AIR FLOW TEST
A. ON THE REAR OF THE AGB, AT 7 O'CLOCK AFT LOOKING FORWARD, REMOVE THE SUPPLY TUBE ROUTED BETWEEN
THE AGB AND THE LUBRICATION UNIT.

B. CONNECT THE TEST RIG AIR SUPPLY HOSE TO THE AGB.
　
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