*
COMPUTER OK -green LED stays on when GPWC has power and operates normally
*
COMPUTER FAIL -red LED turns on when the GPWC has an internal failure.
The front panel door allows access to these:
*
PRESS TO SELF TEST switch -starts a GPWS test
*
Headphone jack -lets you hear self test audio
*
Memory card slot -lets you upload software from a Personal Computer Memory Card International Association (PCMCIA) memory card or download fault and warning history data
*
Upload/download status indicators -shows conditions of upload or download operation
*
RS-232 connector -used for shop test or for the upload/ download of data.
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GPWS -GROUND PROXIMITY WARNING COMPUTER
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GPWS -CONTROL -EFIS CONTROL PANEL
Description
The EFIS control panel provides these functions:
*
Enables the navigation displays (NDs) to show terrain data
*
Supplies the selection of different ND modes
*
Supplies the selection of different ranges for terrain data to show on the NDs.
TERR Map Switch
When you push the TERR map switch on the EFIS control panel, terrain data shows on the on-side ND. Push the TERR map switch again to remove the display.
ND Mode Selector
Use the ND mode selector to select an ND mode. The ND modes that show terrain data are:
*
Expanded APP (approach) mode
*
Expanded VOR mode
*
Expanded MAP mode
*
Centered MAP mode.
If the mode selector is not in a correct mode when you push the TERR map switch, the terrrain display arms. When armed, the terrain display shows as soon as you change the ND selector to a correct mode. The terrain display stays armed even if you push the TERR map switch again. Push the WXR map switch to disarm the terrain display and arm the weather display.
ND Range Selector
The EFIS control panel has a six position range selector. The range selections are 10, 20, 40, 80, 320 and 640 NM. The map mode displays the range at all times. APP and VOR modes display the range only when TERR or WXR data show.
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GPWS -CONTROL -EFIS CONTROL PANEL
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GPWS -CDU SELECTIONS
Alternate or Backup EFIS Control Panel * Push the TERR LSK on the EFIS OPTIONS page for ON/OFF control of the GPWS and to enable the terrain display for the The EFIS control page on the control display unit (CDU) permits on-side ND.
* Push the CONTROL LSK on the EFIS OPTIONS page to alternate or backup controls for the ground proximity warning return to the EFIS CONTROL page.
system.
You can use the EFIS CP CDU pages on the CDU at any time. If the EFIS control panel (CP) fails or for alternate operation, use the EFIS control CDU pages on the on-side CDU for:
*
On/off control of the on-side terrain display
*
Terrain display range selection
*
ND mode selection.
When you select EFIS control to ON from the CDU page, the on-side EFIS CP does not operate.
Access
To get the EFIS control CDU pages on the CDU:
*
Push the MENU line select key (LSK) on the CDU to make the
MENU page come on
*
Push the EFIS CTL LSK on the MENU page and the EFIS
prompt comes on
*
Push the LSK next to EFIS and the EFIS control page comes
on
*
Select the ND modes and range From the EFIS CONTROL
page
*
Push the OPTIONS LSK on the EFIS CONTROL page to go to
the EFIS OPTIONS page
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GPWS -CDU SELECTIONS
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GPWS -CONTROL COMPONENTS
Description
These are the controls on the landing gear panel:
*
Ground proximity light
* 中國航空網 www.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：777 AMM 飛機維護手冊 導航 Navigation 1(63)
