AIMS -MISCELLANEOUS RACKS COMPONENT LOCATIONS
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AIMS -AIMS CABINET COMPONENT LOCATIONS
AIMS Component Locations
An AIMS cabinet includes eight LRMs and an AIMS cabinet chassis. The left AIMS cabinet components are:
*
Cabinet chassis
*
Core processor module/communication (CPM/Comm)
*
CPM/airplane condition monitoring function (CPM/ACMF)
*
CPM/graphics generator (CPM/GG) (2)
*
Input/output module (IOM) (4).
The right AIMS cabinet components are the same except there is a CPM/Basic in place of a CPM/ACMF.
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777 AIRCRAFT MAINTENANCE MANUAL
AIMS -AIMS CABINET COMPONENT LOCATIONS
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AIMS -INPUT POWER INTERFACES
General
Each AIMS cabinet receives power through four circuit breakers in the overhead circuit breaker panel. Each AIMS cabinet also receives power through one hot battery bus circuit breaker in the standby power management panel.
The left AIMS cabinet gets electrical power from the 28v dc capt flight instrument bus, the 28v dc F/O flight instrument bus, and the hot battery bus. The right AIMS cabinet gets electrical power from the 28v dc left bus, the 28v dc right bus, and the hot battery bus.
The electrical power goes through a power filter on the back of the AIMS cabinet and then goes to the backplane power bus. The backplane power bus supplies power to the eight LRMs in the cabinet.
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777 AIRCRAFT MAINTENANCE MANUAL
AIMS -INPUT POWER INTERFACES
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AIMS -CONFIGURATION PIN INTERFACES
Configuration Pins
The left and right AIMS cabinets have program pins that set the configuration of the:
*
Cabinet position
*
Engine manufacturer
*
Airframe type
*
Wingfold configuration
*
Parity for the program pins.
The parity pin is grounded when an even number of program pins are grounded.
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AIMS -FLIGHT CONTROLS ARINC 629 BUSES INTERFACES
General
The AIMS cabinets receive data on all three of the flight controls ARINC 629 buses and transmit data on the left and right buses. The AIMS cabinets also transmit data on the center flight controls ARINC 629 bus when the airplane is on the ground. The AIMS cabinets transmit data loading information and maintenance data on the center flight controls ARINC 629 bus.
The LRUs that have an interface with the AIMS cabinets on the flight controls ARINC 629 buses are the:
*
Air data inertial reference unit (ADIRU)
*
Secondary attitude air data reference unit (SAARU)
*
Air data module (ADM), static (3)
*
Air data module (ADM), pitot (3)
*
Primary flight computer (PFC) (3)
*
Actuator control electronics (ACE) (4)
*
Flight control power supply assembly (FCPSA) (3).
The control display units (CDUs) and the autopilot flight director computers (AFDCs) connect to the flight controls ARINC 629 buses. However, the CDUs and AFDCs do not communicate with the AIMS cabinets on the flight controls ARINC 629 buses.
ADIRU
The AIMS cabinets receive inertial reference data and air data from the ADIRU on the left and right flight controls ARINC 629 buses. The AIMS cabinets transmit data to the ADIRU on the left and right flight controls ARINC 629 buses.
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SAARU
The AIMS cabinets receive inertial reference data and air data from the SAARU on the center flight controls ARINC 629 bus. The AIMS cabinets transmit data to the SAARU on the left and right flight controls ARINC 629 buses.
ADM
The AIMS cabinets receive static pressure and total pressure data from the six ADMs on the three flight controls ARINC 629 data buses. The AIMS cabinets transmit data to the six ADMs on the left and right flight controls ARINC 629 data buses.
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