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The BSV status is provided through the two position switches, located on the valve itself. 
The fuel/air ratio calculation uses PS3 and T3 parameters. 
The BSV inhibition logic uses different parameters: Engine speed N2, valve position unknown, A/C flight/ ground position. 
The BSV position demand logic uses the Fuel Metering Valve (FMV) position feedback signal. 
EFFECTIVITY ALL CFM56-5B ENGINES FOR A319-A320-A321 CFMI PROPRIETARY INFORMATION  73-11-70 ENGINE SYSTEMS  Page 12 Jan 03 

EFG

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CTC-201-109-01
EFFECTIVITY
73-11-70 Page 13
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 NOZZLE

EFFECTIVITY
73-11-40 Page 1
ALL CFM56-5B ENGINES FOR A319-A320-A321
ENGINE SYSTEMS Jan 03

CFMI PROPRIETARY INFORMATION
CFM56-5B TRAINING MANUAL
EFG
FUEL NOZZLE
The fuel nozzles spray fuel into the combustion chamber and ensure good light-off capability and efficient burning at all engine power settings.
There are twenty fuel nozzles, which are installed all around the combustion case area, in the forward section.

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EFFECTIVITY ALL CFM56-5B ENGINES FOR A319-A320-A321 CFMI PROPRIETARY INFORMATION CTC-201-114-02
 .  73-11-40 ENGINE SYSTEMS  Page 3 Jan 03 

CFM56-5B TRAINING MANUAL
EFG
FUEL NOZZLE
Basically, all fuel nozzle models are similar, provide the same operational performances, and are mounted and connected to the engine in an identical manner.
However, four nozzles located in the pilot burning area in the combustion chamber, on either side of the spark plugs, have a wider primary spray angle.
The wider spray angle is incorporated to improve altitude re-light capability.
To facilitate identification of the nozzle type, a colour band is installed on the nozzle body. The colours are also engraved on the band.
-Blue colour band on the 16 regular fuel nozzles.
-Natural colour band on the 4 wider spray fuel
nozzles.

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CTC-201-117-02
EFFECTIVITY
73-11-40 Page 5
ALL CFM56-5B ENGINES FOR A319-A320-A321
ENGINE SYSTEMS Jan 03

CFMI PROPRIETARY INFORMATION
CFM56-5B  TRAINING MANUAL
EFG
FUEL NOZZLE
The fuel nozzle is a welded assembly which delivers fuel through two independent flows, and consists of:
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 A cover, where   the nozzle fuel inlet connector is
located.

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 A cartridge assembly, which encloses a check valve
and a metering valve.

 
　
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