G900X/G950 Installation and Maintenance Manual – GDC 74A
Page 6-3
190-00719-00
Revision
D
6.3 Environmental
Specifications
NOTE
The GDC 74A may require a warm-up period of 15 minutes to reach full accuracy (30
minutes if the environmental temperature is less than 0°C).
Table 6-2 contains a list of
environmental specifications for the GDC 74A.
Table 6-2. GDC 74A Environmental Specifications
Specification Characteristic
Regulatory Compliance
RTCA/DO-160D Environmental Conditions and
EUROCAE/ED-14D
Unit Software
RTCA/DO-178B Level B
Aircraft Pressure Altitude
Range
-1,400 feet to 50,000 Feet
Aircraft Vertical Speed
Range
-20,000 feet per minute to +20,000 feet per minute
Aircraft Airspeed Range
450 Knots
Aircraft Mach Range
<1.00 Mach
Aircraft Total Air
Temperature Range
-85
°
C to +85
°
C
Unit Operating
Temperature Range
-55
°
C to +70
°
C
6.3.1 Environmental Qualification Form
Refer to the GDC 74A Environmental Qualification Form, Garmin part number 005-00191-77, for a
complete list of environmental characteristic.
