CFM56-3 technical training manual : Component Identification

CFM56-3 TRAINING MANUAL

COMPONENT IDENTIFICATION

ALL GENERAL CFMI PROPRIETARY INFORMATION Page 1 Dec 00

This CFMI publication is for Training Purpose Only. The information is accurate at the time of compilation; however, no update service will be furnished to maintain accuracy. For authorized maintenance practices And specifications, consult the pertinent maintenance publications. The information (including technical data) contained in this document is the property of CFM International (GE and SNECMA). It is disclosed in confidence, and the technical data therein is exported under a U.S. Government license. In addition, the technical data therein and the direct product of those data, may be diverted, transferred, exported or disclosed in any manner not provided for by the license without the prior written approval of both the U.S. Government and CFM International







ITEM NO.

IDENTIFY THE LINE, ACCESSORY OR COMPONENT

ITEM NO.

SELECT THE PURPOSE THAT MATCHES THE LINE ACCESSORY OR COMPONENT

Rear Spinner Cone Elliptical shape prevents ice formation

Abradable Liner Balance the low pressure system

Ps12 Sensing Port (4) Supplies engine serial number, thrust rating and takeoff rating

Engine Data Plate Supplies high voltage power to the igniters

Balance Screws Supplies sound suppression

Forward Acoustical Panel Prevents direct contact of fan blade into the case during engine operation

Ignition Exciter (2) Electronic over-ride of the MEC

Power Management Control (PMC) Static air pressure from static port to Ps12 manifold

T12 Fan Inlet Sensor (stowed) Fan inlet temperature to PMC

Front Spinner Cone Axial retention of fan blades and provision for balance screw placement








ITEM NO.


ITEM NO.


Fan Frame Transmits high voltage from the upper exciter to the 8 o’clock igniter

Left Hand Ignition Lead Supplies cooling air to the right and left ignition lead conduit for lead cooling

Air Manifold Front section shouldered to give fan blade containment

Fan Case 1 of 2 main engine structural frames

Right Hand Ignition Lead Used for engine lifting

Front Lifting Trunnion Transmits high voltage from the lower exciter to the 4 o’clock igniter







ITEM NO.


ITEM NO.


J2 Connector Access PLA gain adjustment

J5 Connector Input signal from the flight deck

J4 Connector Monitor connector for test

J3 Connector Input signal for N1, T12, and PLA output signal for MEC torque motor

Cover Plate PMC Input power supplied by the control alternator

Ps12 Signal line Air signal from Ps 12 manifold to PMC







ITEM NO.


ITEM NO.


Visual Oil Quantity Window Supplies oil overflow containment during servicing

Oil Tank Anti-Siphon Line Prevents oil tank siphoning after engine shutdown

Oil Scupper To support the engine on the ground

Fan Frame Ground Handling Mount (Right Hand)

To balance internal sump pressures

Gravity Fill Oil Cap Supplies visual inspection of oil tank service limits

Oil Tank Vent Line Seals oil tank and allows for servicing and oil sampling

Oil Tank Quantity Transmitter Transmit oil tank quantity to flight deck







ITEM NO.


ITEM NO.


Oil Tank Pressure Fill and Overflow Ports Supplies N1 speed signal to PMC and flight deck

Oil Scavenge Return Line Supplies oil from oil tank to lube unit pressure pump

Oil Tank Storage of engine lubrication oil

Lube Unit Supply Line Supplies scavenge oil return from servo heater to oil tank

N1 Speed Sensor Supplies remote pressure servicing of the oil tank







ITEM NO.


ITEM NO.


Aft Acoustical Panel Cooling of CSD/IDG oil

Mid Acoustical Panel Sound Suppression

CSD/IDG Oil Cooler Pad Air directed to the aircraft generator for cooling

Generator Cooling Inlet Sound suppression

Outlet Guide Vanes (80) Points fan discharge air flow in a straight path







ITEM NO.


ITEM NO.


Alternate Vibration Sensor Pad Supplies HPC bleed air to the HPT shroud to increase engine efficiency

T2.5 (CIT) Sensor (Inside Frame) Supplies compressor inlet temperature to MEC

Air Ignition Tube Supplies static rigging of variable stator vane actuator to the system

High Pressure Turbine Clearance Control Valve (HPTCCV)

Ignite fuel/air mixture and BSI port S10

VSV Actuator Rig Pin Hole (Right Side) Connects No. 1 bearing vibration sensor with aircraft

Electrical Connector, Bearing Vibration Sensor To connect each VSV actuation ring

Igniter - Lower Right Hand Side Combustor Case

Alternate No. 1 bearing vibration sensor mounting pad

VSV Actuation Connecting Links Supplies cooling air from the booster to the air manifold







ITEM NO.


ITEM NO.


Borescope Port S7 BSI stage 8 trailing edge and stage 9 leading edge HPC




Borescope Port S1 BSI IGV and leading edge stage 1 HPC











ITEM NO.


ITEM NO.


IGV Actuation Half Ring Stage 2 VSV scheduling

Stage 3 Actuation Half Ring Connects turbine frame bearing vibration sensor to aircraft

Stage 2 Actuation Half Ring IGV angle scheduling

Stage 1 Actuation Half Ring Stage 3 VSV scheduling

Electric Connector, Bearing Vibration Sensor Stage 1 VSV scheduling







ITEM NO.


ITEM NO.


Fuel Nozzle (20) Supplies fuel to the combustion chamber

Shrouded Fuel Manifold Supplies stage 9 bleed air to the HPTCCV

HPC Stage 9 Bleed Tap Supplies fuel to the fuel nozzles

Bleed Bias Sensor (CBP) Senses use of customer bleed air

HPTCCV Discharge Manifold Supplies stage 5, stage 9, or mixed bleed air to HPT shroud







ITEM NO.


ITEM NO.


Turbine Frame Supplies fan discharge air to LPT Case for cooling

Distribution Box LPT Case Cooling Prevents flame propagation in the center vent tube

LPT Case Cooling Manifold Supports the engine on the ground

Turbine Frame Ground Handling Mount Supplies fan discharge air to LPT case cooling manifold

Flame Arrestor Connects EGT system to flight deck indicator

T4.95 (EGT) Junction Connector Second structure frame of engine

T4.95 (EGT) Thermocouple Probes (9) Sense exhaust gas temperature







ITEM NO.


ITEM NO.


Borescope Port S22 Scavenge return of oil from aft sump to lube unit

Aft Sump Oil Scavenge Line BSI stage 3 leading edge and stage 2 trailing edge LPTR

Borescope Port S17 Supplies oil to aft sump from lube unit

Aft Sump Supply Line BSI HPTR trailing edge and stage 1 LPTR leading edge

Borescope Port S21 BSI stage 4 leading edge and stage 3 trailing edge LPTR







ITEM NO.


ITEM NO.


Low Pressure Turbine Stator Case Supplies stage 5, stage 9, and mixed bleed air to the HPT shroud

HPC Stage 9 Bleed Port (4) Support the HPT shrouds in the HPTR area

HPC Stage 5 Bleed Manifold (4) LPT Stage 1 Cooling

Stage 9 customer bleed air

HPT Shroud Support Supplies fuel to left hand side nozzles

Fuel Manifold (Left Hand Side) Connect EGT system to flight deck indicator

T4.95 (EGT) Junction Connector Transmits vibration signal from the turbine frame sensor to connector

Turbine Frame Vibration Sensor Cable Enclose the four LPT stages

HPTCCV Discharge Manifold Supplies stage 5 bleed air for stage 1 LPT nozzle cooling

Borescope Port S18 BSI HPTR trailing edge and stage 1 HPTR leading







ITEM NO.


ITEM NO.


Left Hand Ignition Lead Stage 5 customer bleed air

HPC Stage 5 Start Bleed Valve Supplies fuel to the combustion chamber

Igniter–Lower Left Hand Side Combustion Case Transmits high voltage from the upper exciter to the 8:00 igniter

Fuel Nozzle (20) Supplies start air pressure to the HPC stage 5 start bleed valve

CDP (PS3) Tap and Signal Line Ignites the fuel/air mixture and BSI Port S11

HPC Stage Bleed Port (3) Aerodynamically unloads the HPC during start

Combustion Case Transmits the compressor discharge pressure signal to the MEC

Air Signal Start Bleed Tube Contains the combustion chamber







ITEM NO.


ITEM NO.


Master VBV Ball Screw Actuator (1) Changes the VBV fuel gear motion into VBV linear rotational motion

Fan Duct Panel Supplies by-pass of primary airflow into the secondary airflow

Variable Bleed Valve (12) Points airflow from the booster through the open VBV doors to the fan by-pass air

VBV Stop Mechanism Controls the range of movement of the VBV fuel gear motor

Kicker Stop Transmits VBV master ball screw position to feedback cable

Feedback Rod Clevis Supplies a stop for the free lever







ITEM NO.


ITEM NO.


Return Lever Uses fuel pressure to turn the motor drive, which opens or closes the VBVs

VBV Feedback Cable Rod End Bearing Supplies a biased feedback signal to the MEC to further open VBV doors

Free Lever Transmits rod end fuel pressure from the MEC to the VSV actuator

VSV Rod End Pressure Line Transmits head end fuel pressure from the MEC to the VSV actuator

VSV Head End Pressure Line Adjusts the length of the VBV feedback cable during the travel check

VBV Gear Motor Returns the VBV to the normal MEC schedule







ITEM NO.


ITEM NO.


TC2 Signal Line Carries Pb or Pc fuel pressure from the MEC to the HPTCCV 9th stage valve

Idle Solenoid Carries Pb or Pc fuel pressure from the MEC to the HPTCCV 5th stage valve

TC3 Signal Line (-3B2/-3C only) Drains oil from the forward sump seal cavity to overboard

Cavity Drain Carries fuel pressure from the MEC to the VSV actuators to open the VSVs

VSV Rod End Pressure Line Electrically supplies flight and ground idle (high and low idle) by the aircraft’s flight condition

VSV Head End Pressure Line Carries fuel pressure from the MEC to the VSV actuators to close the VSVs

TC1 Signal Line Signal pressure to the timer solenoid during a takeoff with n2 larger than 95%







ITEM NO.


ITEM NO.


Electric Connector Transmits PLA from the MEC to the PMC and transmits the TMC from the PMC to the MEC

VSV Feedback Cable To rig the position of the pointer with the VSV rig notch

Pb Pressure Line To rig the position of the pointer with the VBV rig notch

VBV Feedback Cable Carries Pb (low) pressure from the CIT (T25) sensor to the MEC

Adjustment Screw VSV Feedback Cable Carries P6 (high) pressure from the MEC to the CIT (T25) sensor

P6 Pressure Line Indicates VBV door position to the MEC

Adjustment Screw VBV Feedback Cable Indicates VSV position to the MEC







ITEM NO.


ITEM NO.


Oil Scavenge Return Line Transmits flight deck throttle demand to the MEC

Oil Scavenge Line Supplies static rigging procedure of the VSV actuator to the system

VSV Actuator Rig Pin Hole (Left Side) Supplies positive fuel ON/OFF selection

VSV Actuator (Left Side) Supplies fuel from the servo fuel heater to the MEC

VBV Open Port Line Fuel pressure from the MEC to the rod end or the head end actuates the VSV system

Power Lever Supplies scavenge oil return from the servo heater to the oil tank

Fuel Shutoff Lever Holds all servo mechanism lines

Full Reverse Power Lever Stop Supplies stoppage for the power lever at its 130-degree stop (non-adjustable)

Fuel Supply Line Supplies mechanical stoppage for the power lever (non-adjustable)

9 O’clock Tube Bundle Supplies oil from the scavenge filter to the servo fuel heat exchanger

VBV Close Port Line Supplies fuel from the MEC to the VBV motor to open the VBVs

Full Forward Power Lever Stop Supplies fuel from the MEC to the VBV motor to close the VBVs







ITEM NO.


ITEM NO.


LP Fuel Pump Screen Assembly De-ices the servo fuel by convection transfer of heat from the scavenge oil

Servo Fuel Heater Transmits power from the IGB to the AGB for the accessories

Transfer Gearbox Supplies gear drive for the accessories

Main Fuel/Oil Heat Exchanger Gives access to the LP stage impeller for verification of rotation

Fuel Supply Heater Tube Supplies vent air from AGB to the forward sump, & protects horizontal drive shaft

Pb Pressure Line (-3B2/-3C only) Transmits fuel from the pump to the servo heater

Fuel Pump Two-stage pump that supplies fuel pressure and drive for the MEC

Fuel Supply Line Pb supply to the timer and timer solenoid valve from the fuel pump

Horizontal Drive Shaft Housing Transmits fuel from the MEC to the fuel flow meter

Accessory Gearbox Cools the engine oil through convection transfer of heat from the oil to the fuel

Main Engine Control (MEC) Supplies schedule fuel for combustion and servo operation







ITEM NO.


ITEM NO.


Forward Sump MCD Collects and filters metallic and non-metallic particles from the AGB/TGB sumps

Lube Supply Filter Supplies one supply pump and three scavenge pumps for oil circulation

PS12 Signal Line Supplies scavenge oil from the lube unit to the scavenge filter element

Oil Scavenge Line Collects and filters metallic and non-metallic particles from the aft sump

Lubrication Unit Supplies static air pressure from the PS12 manifold to the MEC

AGB/TGB Sump MCD Filters the fuel before the fuel flows to the high pressure stage of the fuel pump

Aft Sump MCD Filters the supply oil before the oil flows to the sumps

Fuel Filter Collects and filters metallic and non-metallic particles from the forward sump







ITEM NO.


ITEM NO.


AGB Drain Port Supplies oil from the lube unit to the AGB

Lube Scavenge Filter Filters the scavenge oil before the oil flows to the servo heater

AGB Alignment Turnbuckle Supplies drainage of the AGB sump

MCD Retention Bar Supplies a positive lock of the MCD, and prevents partial disengagement

Oil Supply Line Connects the TGB to the AGB to supply oil scavenging

Visual Clogging Indicator Aligns the AGB for horizontal drive shaft installation

Oil Scavenge Line Supplies a visual indication of the lube supply filter clogging







ITEM NO.


ITEM NO.


TS5 Pressure Line (-3B2/-3C only) Changes the operation of the HPTCCV during takeoff

P7 Pressure Line Transmits Pb (low) pressure from the T2 sensor to the MEC

HPTCCV Timer (-3B2/-3C only) Supplies output of Pc or Pb from the TCC timer to the TCC valve to control stage 5 bleed*

HPTCCV Timer Lockout Solenoid (-3C only) Supplies output of Pc or Pb from the TCC timer to the TCC valve to control stage 9 bleed**

Pb Pressure Line Controls the operation of the stage 5 valve of the TCCV (timer disarmed)

TC1 Pressure Line (-3B2/-3C only) Weight-on-wheels sensing relay, airborne condition prevents TC3 fuel flow to TCCV timer

TS9 Pressure Line (-3B2/-3C only) Transmits P7 (high) pressure from the MEC to the T2 sensor

*NOTE: Timer disarmed TS5 ports Tc1 fuel pressure.

**NOTE: Timer disarmed TS9 ports Tc2 fuel pressure.







ITEM NO.


ITEM NO.


Bellows/Valve Housing (T2) Pc pressure holds the timer latching valve in the latched position *

Pb Pressure Line (-3b2/-3C only) Controls the operation of the stage 9 valve of the TCCV (timer disarmed)

HPTCCV Timer Adjustment Screw (-3B2/-3C only)

Supplies low pressure for timer operation

Pc Pressure Line (-3B2/-3C only) Changes the fuel pressure to the MEC with changes in inlet temperature

TC2 Pressure Line (-3B2/-3C only) The timer starts its sequence when pressure indicates to lock-out solenoid that N2 is 95%

T2 Sensor (Stowed) Supplies the adjustment for the timer operation speed

TC3 Pressure Line (-3B2/-3C only) Supplies the fan inlet temperature to the MEC

*NOTE: This lets the timer open one time each engine cycle







ITEM NO.


ITEM NO.


Hand Cranking Pad Drains to Overboard

Hydraulic Pump Pad Drain Supports the hydraulic pump

Hydraulic Pump Pad Drains to overboard

Starter and Hand Cranking Pad Drain Drains to overboard

CSD/IDG Cavity Reservoir Standpipe Drain Supports the air starter

Pneumatic Starter Pad Lets the operator rotate the core during maintenance

CSD/IDG Pad Transmits power to the PMC and flight deck N2 speed indication

CSD/IDG Pad Drain Supports the CSD/IDG

Control Alternator Makes sure oil level of the CSD/IDG is normal during servicing







ITEM NO.


ITEM NO.


Core Major Module Contains the LPT rotor, LPT stator, LPT shaft, and the LPT frame

Fan Major Module

Contains fan/booster, No. 1 and 2 bearing support, IGB, No. 3 bearing, fan frame, TGB and AGB

Low Pressure Turbine (LPT) Major Module Contains HPC rotor & stators, combustor case & liner, HPT nozzle & rotor, and LPT nozzle




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CFM56-3 technical training manual : Component Identification

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