Some 777 airplanes may have a MAT that appears different than this MAT. The components of this MAT are not interchangeable with any other type of MAT.
Before you remove the MAT, put a protective cover over the front of the display to protect the screen.
The fiber optics connection must be removed separately. Do not support the weight of the MAT by the fiber optics connection. Do not let the fiber optics connection fall through the fiber optics connection access in the p18 second observers panel.
You must install a new mounting bracket inside the P18 second observers panel before you can install this MAT into earlier 777 airplanes.
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Config 002
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777 AIRCRAFT MAINTENANCE MANUAL
CMCS -MAINTENANCE ACCESS TERMINAL
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CMCS -MAINTENANCE ACCESS TERMINAL KEYBOARD
Purpose
The MAT keyboard supplies:
*
Standard keyboard functions
*
Alternate cursor control capability.
Physical Description
The keyboard is 15 inches wide, 5.7 inches deep, and 2 inches high.
The MAT keyboard weighs approximately 4.5 pounds.
The keyboard stows on edge in the built-in stowage slot.
The keyboard has a non-removable cable at the back that connects to airplane wiring inside the keyboard slot. The keyboard cable is 48 inches long.
Training Information Point
Store the keyboard so the keyboard cable does not touch the keyboard keys. If the keyboard cable, or anything else, pushes the keyboard keys, the MAT may not operate.
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CMCS -MAINTENANCE ACCESS TERMINAL KEYBOARD
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CMCS -PORTABLE MAINTENANCE ACCESS TERMINAL
Purpose
The portable maintenance access terminal (PMAT) lets the operator access the CMCS and the airplane condition monitoring system (ACMS) from various locations on the airplane. All functions available on the maintenance access terminal are available on the PMAT. The locations are:
*
Flight deck
*
Main equipment center
*
Nose wheel well
*
Right main wheel well
*
Jack screw area.
The PMAT in the main equipment center is permanently mounted on top of the E4 rack.
Physical Description
The PMAT is 14.00 inches wide, 14.70 inches deep, and 4.75 inches high.
The PMAT weighs 16 pounds.
An interface cable connects to the back of the PMAT and supplies and interface to the airplane.
The PMAT receptacle has a dust cover for protection against dust and fluids.
PMAT Receptacle
The PMAT receptacle supplies an interface between a PMAT and the avionics local area network (AVLAN). The PMAT receptacle in the main equipment center also supplies power to the PMAT.
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CMCS -PORTABLE MAINTENANCE ACCESS TERMINAL
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CMCS -FUNCTIONAL DESCRIPTION
General
The CMCF is software in the CPM/Comm that does many operations. The CMCF divides the software into many sub-functions. The software sub-functions supply these:
*
Redundancy management
*
BITE
*
Power-up configuration checks
*
Power-up hardware failure detection
*
Fault data processing
*
Fault and FDE correlation
*
Data tables
*
Flight leg and flight phase calculations
*
Ground tests
*
Input monitoring
*
Special functions
*
On-board engine balancing
*
System configuration
*
Software controlled options
*
Shop faults processing
*
Airline database
*
Report generation
*
Data load gateway
*
Interface protocol.
There is CMCF software in each CPM/Comm.
Redundancy Management
Each CMCF supplies a redundancy management sub-function which does: 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：777 AMM 飞机维护手册 中央维护 Central Maintenance(7)
