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Description
The GPWC is the main component of the GPWS. The computer
front panel contains three LEDs that show internal and external
failures. The front panel also contains a self-test switch. The
switch provides access to six self-test modes. The faults are
annunciated through the flight deck speakers or through
headphones connected to the jack below the switch.
You can update the computer operational software and terrain
database with a download from a PC card that you put into the
front panel PCMCIA interface slot. When you put the card in, the
computer downloads data without further action. There are four
status lEDs to show the progress of the memory card data
transfer. A blank formatted card may be used to download
GPWS fault history data.
The computer has a front panel, 15-pin, D-type portable PC test
connector (RS-232) for a serial data connection to a PC
compatible computer.
Physical Description
The GPWC is a standard ARINC 600, 2 MCU. The dimensions
are 2.4 inches wide, 7.9 inches high, and 14.3 long. The
computer weighs 7 pounds and uses 115v ac, 400 HZ singlephase
power for operation.
The GPWC is cooled with air from the equipment cooling sytem.
The cooling air for the GPWC is blow-through.
Front Panel
The GPWC front panel has three status LEDs and a door.
These are the three status LEDs on the front panel:
* EXTERNAL FAULT - amber LED turns on for a failure
external to the GPWC
* COMPUTER OK - green LED stays on when GPWC has
power and operates normally
* COMPUTER FAIL - red LED stays on when the GPWC has an
internal failure.
The front panel door gives access to these:
* SELF-TEST switch - starts a test of the GPWS
* Headphone jack - lets you hear self-test audio
* Memory card slot - lets you upload software from a memory
card or download fault and warning history data
* Upload/download status indicators - show conditions of the
upload or download operation
GPWS - GROUND PROXIMITY WARNING COMPUTER
EFFECTIVITY
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* RS-232 connector - used for shop test, or for the upload/
download of data with a compatible PC computer.
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GPWS - GROUND PROXIMITY WARNING COMPUTER
GPWS - GROUND PROXIMITY WARNING COMPUTER
EFFECTIVITY
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Description
The EFIS control panel lets the flight crew choose the
information they want to show on the navigation displays.
These controls interface with the GPWS:
* TERR Map switch
* ND mode selector
* ND range selector.
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 terrain data.
ND Mode Selector
Use the ND mode selector to choose an ND mode. These are
the ND modes that show terrain data:
* Expanded APP (approach) mode
* Expanded VOR mode
* Expanded MAP mode
* Centered MAP mode.
When you push the TERR map switch the terrain data arms,
even if it is not in the correct mode. The terrain data shows
when you change the ND selector to a correct mode. The terrain
data stays armed even if you push the TERR map switch again.
Push the WXR map switch to disarm the terrain data and arm
the weather data.
ND Range Selector
The EFIS control panel has an eight-position range selector.
The range selections are 5,10, 20, 40, 80, 160, 320, and 640 NM.
The map mode shows the range at all times. Terrain data
shows only in the 5NM through 320 NM selections. When the
range selector is in the 640NM range, terrain data will only
show to 320NM.
GPWS - EFIS CONTROL PANEL
EFFECTIVITY
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GPWS - EFIS CONTROL PANEL
GPWS - EFIS CONTROL PANEL
EFFECTIVITY
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