CFM56-5B TRAINING MANUAL BASIC ENGINE
This CFMI publication is for Training Purposes Only. The information is accurate at the time of compilation; however, noupdate service will be furnished to maintain accuracy. For authorized maintenance practices and specifications, consult
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.
Therefore, None of the information may be disclosed to other than the recipient.
In addition, the technical data therein and the direct product of those data, may not be diverted, transferred, re-exported
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CFM International. Chapter Section Page
Table of Contents 1 to 2
Lexis 1 to 8
Intro 1 to 8
72-00-00 Engine General 1 to 10
72-20-00 Fan Section 1 to 24
72-00-02 Core Engine Major Module 1 to 4
72-30-00 High Pressure Compressor Section 1 to 6
72-40-00 Combustion Section 1 to 6
72-50-00 Turbine Section 1 to 12
72-60-00 Accessory Drive Section 1 to 12 ABBREVIATIONS & ACRONYMS
A
A/C AIRCRAFT
AC ALTERNATING CURRENT
ACARS AIRCRAFT COMMUNICATION
ADDRESSING & REPORTING SYSTEM
ACMS AIRCRAFT CONDITION MONITORING
SYSTEM
ACS AIRCRAFT CONTROL SYSTEM
ADC AIR DATA COMPUTER
ADEPT AIRLINE DATA ENGINE PERFORMANCE
TREND
ADIRU AIR DATA AND INERTIAL REFERENCE
UNIT
AGB ACCESSORY GEARBOX
AIDS AIRCRAFT INTEGRATED DATA SYSTEM
ALF AFT LOOKING FORWARD
ALT ALTITUDE
AMB AMBIENT
AMM AIRCRAFT MAINTENANCE MANUAL
AOG AIRCRAFT ON GROUND
APU AUXILIARY POWER UNIT
ARINC AERONAUTICAL RADIO, INC.
(SPECIFICATION)
ATA AIR TRANSPORT ASSOCIATION
ATHR AUTO THRUST
ATO ABORTED TAKE-OFF
B
BITE BUILT-IN TEST EQUIPMENT
BMC BLEED MONITORING COMPUTER BSI BORESCOPE INSPECTION
BSV BURNER STAGING VALVE
BVCS BLEED VALVE CONTROL SOLENOID
C
CBP (HP) COMPRESSOR BLEED PRESSURE
CCDL CROSS CHANNEL DATA LINK
CCFG COMPACT CONSTANT FREQUENCY
GENERATOR
CCU COMPUTER CONTROL UNIT
CCW COUNTER CLOCKWISE
CDP (HP) COMPRESSOR DISCHARGE
PRESSURE
CFDIU CENTRALIZED FAULT DISPLAY
INTERFACE UNIT
CFDS CENTRALIZED FAULT DISPLAY SYSTEM
CFMI JOINT GE/SNECMA COMPANY (CFM
INTERNATIONAL)
Ch A channel A
Ch B channel B
CMC CENTRALIZED MAINTENANCE
COMPUTER
CMM COMPONENT MAINTENANCE MANUAL
CG CENTER OF GRAVITY
cm.g CENTIMETER x GRAMS
CHATV CHANNEL ACTIVE
CFDIU CENTRALIZED FAULT DISPLAY
INTERFACE UNIT
CFDS CENTRALIZED FAULT & DISPLAY SYSTEM
CIP(HP) COMPRESSOR INLET PRESSURE CIT(HP) COMPRESSOR INLET TEMPERATURE
CODEP HIGH TEMPERATURE COATING
CPU CENTRAL PROCESSING UNIT
CRT CATHODE RAY TUBE
CSD CONSTANT SPEED DRIVE
CSI CYCLES SINCE INSTALLATION
CSN CYCLES SINCE NEW
Cu.Ni.In COPPER.NICKEL.INDIUM
CW CLOCKWISE
D
DAC DOUBLE ANNULAR COMBUSTOR
DC DIRECT CURRENT
DCU DATA CONVERSION UNIT
DISC DISCRETE
DIU DIGITAL INTERFACE UNIT
DMC DISPLAY MONITORING COMPUTER
DMU DATA MANAGEMENT UNIT
DPU DIGITAL PROCESSING MODULE
DRT DE-RATED TAKE-OFF
E
EBU ENGINE BUILDUP UNIT
ECAM ELECTRONIC CENTRALIZED AIRCRAFT
MONITORING
ECS ENVIRONMENTAL CONTROL SYSTEM
ECU ELECTRONIC CONTROL UNIT EFH ENGINE FLIGHT HOURS
EFIS ELECTRONIC FLIGHT INSTRUMENT
SYSTEM
EGT EXHAUST GAS TEMPERATURE
EICAS ENGINE INDICATING AND CREW
ALERTING SYSTEM
EIS ELECTRONIC INSTRUMENT SYSTEM
EIU ENGINE INTERFACE UNIT
EMF ELECTROMOTIVE FORCE
EMI ELECTRO MAGNETIC INTERFERENCE
EMU ENGINE MAINTENANCE UNIT
EPROM ERASABLE PROGRAMMABLE
READ-ONLY MEMORY
ESN ENGINE SERIAL NUMBER
EVMU ENGINE VIBRATION MONITORING UNIT
EWD ENGINE WARNING DISPLAY
F
FAA FEDERAL AVIATION AGENCY
FADEC FULL AUTHORITY DIGITAL ENGINE
CONTROL
FAR FUEL/AIR RATIO
FDRS FLIGHT DATA RECORDING SYSTEM
FEIM FIELD ENGINEERING INVESTIGATION
MEMO
FFCCV FAN FRAME/COMPRESSOR CASE
VERTICAL (VIBRATION SENSOR) FI FLIGHT IDLE (F/I)
FLA FORWARD LOOKING AFT
FLX TO FLEXIBLE TAKE-OFF
FMGC FLIGHT MANAGEMENT AND GUIDANCE
COMPUTER
FMS FLIGHT MANAGEMENT SYSTEM
FMV FUEL METERING VALVE
FOD FOREIGN OBJECT DAMAGE
FPA FRONT PANEL ASSEMBLY
FPI FLUORESCENT PENETRANT INSPECTION
FRV FUEL RETURN VALVE
FWC FLIGHT WARNING COMPUTER
FWD FORWARD
G
GE GENERAL ELECTRIC
GEM GROUND-BASED ENGINE MONITORING
GI GROUND IDLE (G/I)
g.in GRAM x INCHES
GMT GREENWICH MEAN TIME
GSE GROUND SUPPORT EQUIPMENT
H
HCF HIGH CYCLE FATIGUE
HCU HYDRAULIC CONTROL UNIT
HDS HORIZONTAL DRIVE SHAFT
HMU HYDROMECHANICAL UNIT
HP HIGH PRESSURE
HPC HIGH PRESSURE COMPRESSOR
HPCR HIGH PRESSURE COMPRESSOR ROTOR HPSOV HIGH PRESSURE SHUTOFF VALVE
HPT HIGH PRESSURE TURBINE
HPTC HIGH PRESSURE TURBINE CLEARANCE
HPTCC HIGH PRESSURE TURBINE CLEARANCE
CONTROL
HPTCCV HIGH PRESSURE TURBINE CLEARANCE
CONTROL VALVE
HPTR HIGH PRESSURE TURBINE ROTOR
Hz HERTZ (CYCLES PER SECOND)
I
IDG INTEGRATED DRIVE GENERATOR
ID PLUG IDENTIFICATION PLUG
IFSD IN FLIGHT SHUT DOWN
IGB INLET GEARBOX
IGN IGNITION
IGV INLET GUIDE VANE
in. INCH
I/O INPUT/OUTPUT
IOM INPUT OUTPUT MODULE
IR INFRA RED
K
K X 1000
L
lbs. POUNDS, WEIGHT
LCF LOW CYCLE FATIGUE
LE (L/E) LEADING EDGE
L/H LEFT HAND LP LOW PRESSURE
LPC LOW PRESSURE COMPRESSOR
LPT LOW PRESSURE TURBINE
LPTC LOW PRESSURE TURBINE CLEARANCE
LPTCC LOW PRESSURE TURBINE CLEARANCE
CONTROL
LPTR LOW PRESSURE TURBINE ROTOR
LRU LINE REPLACEABLE UNIT
LVDT LINEAR VARIABLE DIFFERENTIAL
TRANSFORMER
M
MO AIRCRAFT SPEED MACH NUMBER
MCD MASTER CHIP DETECTOR
MCL MAXIMUM CLIMB
MCDU MULTIPURPOSE CONTROL AND
DISPLAY UNIT
MCL MAXIMUM CLIMB
MCT MAXIMUM CONTINUOUS THRUST
MDDU MULTIPURPOSE DISK DRIVE UNIT
mm. MILLIMETERS
MMEL MAIN MINIMUM EQUIPMENT LIST
MTBF MEAN TIME BETWEEN FAILURES
MTBR MEAN TIME BETWEEN REMOVALS
N
N1 (NL) LOW PRESSURE ROTOR
ROTATIONAL SPEED N1ACT ACTUAL N1
N1DMD DEMANDED N1
N1CMD COMMANDED N1
N2 (NH) HP ROTOR ROTATIONAL SPEED
N2ACT ACTUAL N2
NVM NON VOLATILE MEMORY
O
OAT OUTSIDE AIR TEMPERATURE
OGV OUTLET GUIDE VANE
OSG OVERSPEED GOVERNOR
P
P0 AMBIENT STATIC PRESSURE
P25 HPC INLET TOTAL AIR TEMPERATURE
PCU PRESSURE CONVERTER UNIT
PLA POWER LEVER ANGLE
PMC POWER MANAGEMENT CONTROL
PMUX PROPULSION MULTIPLEXER
PS12 FAN INLET STATIC AIR PRESSURE
PS13 FAN OUTLET STATIC AIR PRESSURE
PS3HP COMPRESSOR DISCHARGE STATIC AIR
PRESSURE
psi POUNDS PER SQUARE INCH
psia POUNDS PER SQUARE INCHABSOLUTE
psid POUNDS PER SQUARE INCH
DIFFERENTIAL
psig POUNDS PER SQUARE INCH GAUGE