CHAPTER

45

Central Maintenance

CHAPTER 45 Central Maintenance

45-CONTENTS
Page 7

D633W101-BEJ
Jan 05/2002

CENTRAL MAINTENANCE COMPUTING SYSTEM -INTRODUCTION

General

The central maintenance computing system (CMCS) collects and stores maintenance data for most of the airplane systems. The maintenance access terminal (MAT) or portable maintenance access terminal (PMAT) shows the data. Menu selections on the MAT give access to maintenance functions based on type of task. The CMCS primary functions include:
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Fault processing

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Testing

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Data loading.

The CMCS also does these functions:
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Fault history

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Input monitoring

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Configuration reporting

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Shop faults

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Engine balancing

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PSEU and air/ground rigging

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Report generation.

The MAT also supplies access to on-line help.
Abbreviations and Acronyms

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ACARS -aircraft communications addressing and reporting system

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ACIPS -airfoil and cowl ice protection system

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ACMF -airplane condition monitoring function

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ACMS -airplane condition monitoring system

EFFECTIVITY
BEJ ALL

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ADF -automatic direction finder

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ADIRU -air data inertial reference unit

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ADM -air data module

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AFDC -autopilot flight director computer

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AIMS -airplane information management system

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AMI -airline modifiable information

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AMM -airplane maintenance manual

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APU -auxiliary power unit

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APUC -auxiliary power unit controller

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ARINC -Aeronautical Radio, Inc.

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ASCPC -air supply cabin pressure controller

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ASG -ARINC 629 signal gateway

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ATC -air traffic control

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AVLAN -avionics local area network

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AVM -airborne vibration monitoring

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BPCU -bus power control unit

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BEPS -backup electrical power system

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BSCU -brake system control unit

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BS -bypass switch

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BSU -bypass switch unit

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CCD -cursor control device

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CMCF -central maintenance computing function

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CMCS -central maintenance computing system

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CMR -certification maintenance requirement

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comm -communication

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CPM -core processor module

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CTC -cabin temperature controller

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CTU -cabin telecommunication unit

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DCGF -data conversion gateway function

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DCMF -data communication management function

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DFDAF -digital flight data acquisition function

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DTD -data terminal display

45-10-00

Page 1 D633W101-BEJ May 05/2004

CENTRAL MAINTENANCE COMPUTING SYSTEM -INTRODUCTION

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EEC -electronic engine control

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EICAS -engine indication and crew alerting system

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ELMS -electrical load management system

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FDCF -flight deck communication function

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FDE -flight deck effect

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FIM -fault isolation manual

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FMCF -flight management computing function

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FSEU -flap/ slat electronics unit

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GBST -ground based software tool

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GCU -generator control unit

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GPSSU -global positioning system sensor unit

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GPWC -ground proximity warning computer

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HYDIM -hydraulic interface module

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ICAO -international civil aviation organization

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IMM -intermodule memory

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IOM -input/output module

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ISO -International Standards Organization

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LAN -local area network

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LCD -liquid crystal display

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LDI -loadable diagnostic information

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LED -light emitting diode

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LPT -low pressure turbine

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LRM -line replaceable module

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LRU -line replaceable unit

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MAT -maintenance access terminal

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MEC -main equipment center

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MFD -multi-function display

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MO -maintenance memo

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MPS -maintenance page snapshot

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MTF -maintenance terminal function

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ND -navigation display

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NVM -non-volatile memory

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OEBS -onboard engine balancing system

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OLAN -onboard local area network

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OMS -onboard maintenance system

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OPC -operational program configuration

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OPS -operational program software
　
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