High Pressure Turbine (HPT)
The HPT module is housed in the combustion case and consists of a single stage nozzle that directs the gas flow from the combustion chamber to the HPT rotor blades that drive the HPC rotor.
The LPT stage 1 nozzle is also housed in the combustion case.
Engine cooling
Air from the 4th stage of the HPC is ducted through 4 pipes, to cool down the LPT stage 1 nozzle and the front cavity.
Air from the 4th and 9th stage of the HPC goes through the HPTCC valve and is ducted through 2 pipes, to cool down the cavity that surrounds the HPT shroud.
Page 2
EFFECTIVITY
72-50-00
Dec 00
BASIC ENGINE
ALL CFM56-5B ENGINES FOR A319-A320-A321
CFMI PROPRIETARY INFORMATION
CFM56-5B包H TRAINING MANUAL
HPC 4th / 9th STAGE HPC 4th STAGE COOLING AIR
COOLING AIR LPT STATOR
COMBUSTOR CASE
STAGE 1 LPT NOZZLE
HPT NOZZLE HPT ROTOR
HPT SHROUD
HPTCC VALVE
HPT & STAGE 1 LPT NOZZLE ASSY.
CTC-063-023-02
Page 3
EFFECTIVITY
72-50-00
Dec 00
BASIC ENGINE
ALL CFM56-5B ENGINES FOR A319-A320-A321
CFMI PROPRIETARY INFORMATION
HPT borescope ports
Borescope ports S16 and S17, at the aft of the combustion case at approximately the 5 and 8 o’clock positions, are used to inspect the trailing edge of the HPT blades.
gniter ports S10 and S11, and combustion case ports S12 through S15 are used to inspect the leading edge of the HPT blades.
Page 4
EFFECTIVITY
72-50-00
Dec 00
BASIC ENGINE
ALL CFM56-5B ENGINES FOR A319-A320-A321
CFMI PROPRIETARY INFORMATION
CFM56-5B包H TRAINING MANUAL
BORESCOPE PORT
LOCATIONS (ALF)
S12
S15 S13
S17 S10 IGNITER
S11
IGNITER
S14, S16
FWD
FWD
S16, S17 BORESCOPE PLUG S16 OR S17
HPT BORESCOPE PORTS
CTC-063-033-01
Page 5
EFFECTIVITY
72-50-00
Dec 00
BASIC ENGINE
ALL CFM56-5B ENGINES FOR A319-A320-A321
CFMI PROPRIETARY INFORMATION
Low Pressure Turbine (LPT)
The LPT module converts the energy of combustion gasses into the necessary torque to drive the fan and booster rotor.
The LPT is a 4 stage axial flow turbine that consists of a rotor and stator assembly.
The LPT module front flange is mounted onto the rear flange of the combustor module. Its rear flange is attached onto the LPT frame and its inner flange is secured onto the LPT shaft.
Fan discharge air is ducted through manifolds that are provided with orifices, to direct cooling air onto the LPT outer case.
Page 6
EFFECTIVITY
72-50-00
Dec 00
BASIC ENGINE
ALL CFM56-5B ENGINES FOR A319-A320-A321
CFMI PROPRIETARY INFORMATION
CFM56-5B包H TRAINING MANUAL
TURBINE FRAME
LPT ROTOR / STATOR ASSEMBLY
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