CFMI PROPRIETARY INFORMATION
CFM56-5B TRAINING MANUAL
EFG
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EFG
IDG OIL COOLER

EFFECTIVITY
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ALL CFM56-5B ENGINES FOR A319-A320-A321
ENGINE SYSTEMS Jan 03

CFMI PROPRIETARY INFORMATION
CFM56-5B TRAINING MANUAL
EFG
IDG OIL COOLER
The Integrated Drive Generator (IDG) oil cooler uses the HMU by-pass fuel flow to cool down the oil used in the IDG mechanical area.
The IDG oil cooler is located on the fan case, just above the engine oil tank, between the 9 and 10 o’clock positions.
The interfaces are:
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The fuel supply and return lines.

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The oil supply and return lines.

After the heat exchange, the fuel returns to the inlet of the main oil/fuel heat exchanger, and the oil goes back to the IDG.
The unit consists of a matrix providing the heat exchange operation, a housing, and a cover enclosing a pressure relief valve.

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IDG OIL COOLER DESIGN
CTC-201-139-02
EFFECTIVITY
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ALL CFM56-5B ENGINES FOR A319-A320-A321
ENGINE SYSTEMS Jan 03

CFMI PROPRIETARY INFORMATION
CFM56-5B TRAINING MANUAL
EFG
IDG OIL COOLER
There are two different flows within the unit, the fuel flow, and the oil flow.
The fuel flows inside a tube bundle and the oil circulates around the tube bundle to transfer heat to the fuel.
If the pressure drop is greater than 24 psid inside the matrix, a valve opens and by-passes the matrix.

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CTC-201-138-02
EFFECTIVITY
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ALL CFM56-5B ENGINES FOR A319-A320-A321
ENGINE SYSTEMS Jan 03

CFMI PROPRIETARY INFORMATION
CFM56-5B TRAINING MANUAL
EFG
IDG OIL COOLER
The matrix consists of a tube plate, 7 baffles and aluminum alloy fuel tubes (U-shaped). The fuel tubes are attached to the plate, and the baffles provide 8 oil circulation paths.
The housing encloses the oil supply port, the oil out port, and the oil drain port.
The cover encloses the fuel supply port, the fuel out port, and the bypass valve. This valve is installed in parallel with the fuel inlet and outlet ports, and by-passes the fuel directly towards the heat exchanger, if the differential pressure reaches 24 psi.

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CTC-201-140-01
EFFECTIVITY
73-11-64 Page 7
ALL CFM56-5B ENGINES FOR A319-A320-A321
ENGINE SYSTEMS Jan 03

CFMI PROPRIETARY INFORMATION
CFM56-5B TRAINING MANUAL
EFG
THIS PAGE INTENTIONALLY LEFT BLANK

EFG
FUEL RETURN VALVE

　
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