ATR 42 Model : 400/500
EFIS
FLIGHT INSTRUMENTS
P 9
NOV 97
001
1.10
.
30
EFIS CONTROL PANEL (ECP)
FULL/ARC pb
Repetitive action on this pb alternately selects FULL mode and ARC mode on EHSI.
At power up, FULL mode is automatically displayed.
GSPD/TTG pb
Repetitive actions on this pb alternately selects Groundspeed (GSPD) and Time to
go (TTG) on EHSI display. At power up, Groundspeed is displayed.
This pb is inoperative in composite mode.
ADI/DIM/DH/TST knobs
- Outer knob (ADI DIM) is used to select EADI ON/OFF and to set brightness.
Automatic setting is also performed when ambient brighness changes.
- Inner knob (DH TST) is used to set decision height from - 10 to 990 ft.
Depressing it enables a test of the EFIS system and radio altimeter :
. Test of the EFIS is only functional on the ground, all failure messages appear on
EFIS.
. Radio altimeter test is performed in flight as well as on ground. RA
indication displays 100 ft on EADI.
CAUTION
: In flight, the RA test provides the radar with altitude information
which trigger undue GPWS alerts.
HSI/DIM/WX/DIM knobs
- Outer knob (HSI DIM) is used to select EHSI ON/OFF and to set brightness.
Automatic setting is also performed when ambient brighness changes.
- Inner knob (WX DIM) is used to select ON/OFF weather radar traces, and to set
average brightness in relation to other traces.
N
°
1 BRG (0) selector
To select blue bearing pointer to VOR 1 or to ADF 1.
On OFF position, blue pointer disappears from EHSI.
N
°
2 BRG (
◊
) selector
To select green bearing pointer to VOR 2 or to ADF 2.
On OFF position, green pointer disappears from EHSI.
AA
1
2
3
R
R
R
R
4
5
6
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01/07//2018 REV 1 These notes are not revised after issue For Training Purposes Only
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