User Guide

Garmin G1000 Pilot’s Guide Appendices 190-00383-01 Rev. A
G-2
APPENDIX G
GDC 74A AIR DATA COMPUTER
Physical Specifications
Height: 3.23 inches (8.20 cm)
Width: 3.05 inches (7.75 cm)
Length: 6.45 inches (16.38 cm)
Weight: 1.69 lb (0.77 kg)
Voltage Range: 10 – 33 Vdc
Air Data Specifications
Pressure Altitude Range: -1,400 feet to 50,000 feet
Vertical Speed Range: -20,000 fpm to +20,000 fpm
Airspeed Range: 450 knots
Airspeed Mach Range: <1.00 Mach
Total Air Temperature Range: -85º C to +85º C
GTX 33 MODE S TRANSPONDER
Physical Specifications
Height: 6.30 inches (16.0 cm)
Width: 1.72 inches (4.4 cm)
Depth: 11.05 inches (28.1 cm)
Weight: 3.0 lb (1.36 kg)
Voltage Range: 11 – 33 Vdc
Environmental Specifications
Temperature Range: -45º C to +70º C
Altitude Range: -1,500 feet to 55,000 feet
GEA 71 ENGINE/AIRFRAME UNIT
Physical Specifications
Height: 6.30 inches (16.0 cm)
Width: 1.23 inches (3.12 cm)
Depth: 8.73 inches (22.17 cm)
Weight: 1.75 lb (0.712 kg)
Voltage Range: 9 – 33 Vdc
Environmental Specifications
Temperature Range: -55º C to +70º C
Altitude Range: -1,500 feet to 55,000 feet
GRS 77 AHRS
Physical Specifications
Height: 3.25 inches (8.36 cm)
Width: 3.75 inches (9.53 cm)
Length: 8.5 inches (21.59 cm)
Weight: 2.40 lb (1.08 kg)
Voltage Range: 10 – 33 Vdc
Environmental Specifications
Temperature Range: -55º C to +70º C
Altitude Range: -1,500 feet to 55,000 feet
AHRS Performance
Bank Error: ±1.25º within 30º roll, left or right
and 15º pitch, nose up or down
Maneuvers Range: 360º pitch and roll
Rotation Rate: ±200º per second
Heading: ±2º straight and level flight
Initialization Limitations
For successful in-flight initialization of the GRS 77, the
following conditions must be met:
Primary AHRS operation: ±20º bank and ±5º pitch
Reversion AHRS operation: ±10º bank and ±5º pitch