Miscellaneous Components
Other controls and switches in the flight deck are:
*
Left control display unit (CDU)
*
Right CDU
*
Center CDU.
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PDS Components
The left AIMS cabinet is on the E3-1 shelf in the main equipment center.
The right AIMS cabinet is on the E2-1 shelf in the main equipment center.
Miscellaneous Components
There are these control panels and switches in the flight deck:
*
Left instrument source select panel (ISSP)
*
Right ISSP
*
Captain data uplink control switches
*
First officer data uplink control switches
*
Captain master warning and caution light
*
First officer master warning and caution light
*
Captain forward panel brightness controls
*
First officer forward panel brightness controls.
These are the data uplink control switches:
*
Accept switch
*
Cancel switch
*
Reject switch.
These are the forward panel brightness controls:
*
Outboard display brightness control
*
Inboard display brightness control
*
Inboard display weather radar brightness control.
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PRIMARY DISPLAY SYSTEM -SYSTEM INTERFACE
OPAS Interface
The overhead panel ARINC 629 system (OPAS) receives control panel and switch input data from the flight deck. OPAS multiplexes the analog and discrete data and sends it to AIMS on the systems ARINC 629 bus. OPAS sends control signals to each of the control panels. These components interface with OPAS:
*
Display select panel (DSP)
*
Two cursor control devices (CCD)
*
Two display switching panels
*
Two instrument source select panels (ISSP)
*
Center display control panel.
Primary Display Function (PDF) of AIMS Interface
The PDF of AIMS gets control information from the two EFIS CPs and the two CCDs on ARINC 429 data buses and from the overhead panel ARINC system (OPAS) on the systems ARINC 629 data buses. Additional control information comes from the three CDUs on the systems ARINC 629 buses.
The PDF of AIMS gets airplane information on these buses for display:
*
Flight controls ARINC 629 buses (3)
*
Systems ARINC 629 buses (4)
*
ARINC 429 buses.
The interface between the two AIMS cabinets is on four ARINC 629 intercabinet buses. The PDF of AIMS shares data for redundancy and configuration management.
Display Unit (DU) Interface
The AIMS cabinets send information to the DUs on high speed coaxial-lines through four coaxial couplers. Each coaxial coupler sends data to each DU.
Two remote light sensors (RLS) supply inputs to the two outboard DUs, left RLS to left outboard DU and right RLS to right outboard DU. Other flight deck controls supply additional brightness and contrast controls for the display units.
Each display unit sends information to the AIMS cabinets on ARINC 429 data buses. This data is for fault reporting.
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PRIMARY DISPLAY SYSTEM -POWER INTERFACES
Power
The captain’s flight instrument 28v dc bus supplies power to these components:
*
Left outboard display unit
*
Left inboard display unit
*
Upper center display unit
*
Left cursor control device
*
Left EFIS control panel.
The first officers’s flight instrument 28v dc bus supplies these components:
*
Right outboard display unit
*
Right inboard display unit
*
Right cursor control device
*
Right EFIS control panel.
The left dc bus supplies the lower center display unit with 28v dc.
Switches
An insertion switch is on the inside of each display unit (DU) rack. As the technician installs the DU, the switch closes and completes the circuit for the power input.
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