PRIMARY DISPLAY SYSTEM -EICAS AND MFD FUNCTIONAL DESCRIPTION
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PRIMARY DISPLAY SYSTEM -MASTER CAUTION LIGHTS FUNCTIONAL DESCRIPTION
General
When a caution message shows on the EICAS display, the EICAS function in the CPM GGs make master caution light on signals. The IOMs supply the master caution light on signals to the master caution lights. The master caution lights come on.
When you push the master caution lights, a momentary reset signal goes to the IOMs. The IOMs send the reset signal to the EICAS function in the CPM GGs. The EICAS function then makes the master caution lights go out.
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PRIMARY DISPLAY SYSTEM -DISPLAY FORMAT ALLOCATIONS -1
General
Hardware position pins for display units (DU) determine normal display configuration. A position number identifies each DU location and its normal format. These are the position numbers, normal display format, and location:
*
Position 1 -Captain’s PFD (left outboard)
*
Position 2 -Captain’s ND (left inboard)
*
Position 3 -EICAS display (upper center)
*
Position 4 -First officer’s ND (right inboard)
*
Position 5 -First officer’s PFD (right outboard)
*
Position 6 -Secondary engine (lower center).
Each DU reports its operational status at power-up on the ground or at power-up after a long term power interrupt (5 seconds). The display function latches the configuration in memory. Subsequent in-flight failures of a position pin configuration does not cause format changes or failure indications.
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PRIMARY DISPLAY SYSTEM -DISPLAY FORMAT ALLOCATIONS -1
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777 AIRCRAFT MAINTENANCE MANUAL
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PRIMARY DISPLAY SYSTEM -DISPLAY FORMAT ALLOCATIONS -2
General
Display unit failures or unique requirements cause the need to move displays to alternate DU locations. Some displays move automatically. Controls on the display select panel and the display switching panels enable the operator to move displays manually.
Display Unit Display Format Allocations
Each DU location has the capability to show specific formats.
The left outboard DU shows the captain PFD format only.
The right outboard DU shows the first officer PFD format only.
The center upper DU shows the EICAS display or compacted engine formats.
The left inboard DU shows these displays:
*
Captain ND
*
Captain PFD
*
EICAS display
*
Compacted engine display
*
MFD formats.
The right inboard DU shows these displays:
* First officer ND
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First officer PFD
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EICAS display
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MFD formats.
The center lower DU shows these displays:
*
MFD formats
*
EICAS display
*
Captain ND display
*
First officer ND display.
The left, right inboard and lower center DUs can show the MFD formats. The MFD formats are:
*
Secondary engine display
*
Status display
*
Synoptic displays
*
Maintenance pages
*
Checklists
*
Communication displays.
Inboard Display Selectors
The inboard display selectors control onside movement of display formats to and from the inboard DUs.
The NORM position of the selector has two settings. The ND position causes the inboard DU to show the ND format. The MFD position works with the display select panel (DSP) L or R INBD switch and the other DSP display switches to show one of these displays on an inboard DU:
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PRIMARY DISPLAY SYSTEM -DISPLAY FORMAT ALLOCATIONS -2
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Secondary engine display
*
Status display
*
Synoptic displays
*
Flight deck communication function display.
The L or R INBD switch on the DSP and the MFD position of the selector cause maintenance pages to show on an inboard DU after selection on a CDU.
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