
Garmin G1000 Pilot’s Guide for Cessna Nav III190-00498-00 Rev. A
G-3
APPENDIX G
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/Pitch 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 fol-
lowing attitude limitations must be met:
Primary AHRS operation: ±20º bank and ±5º pitch
Reversion AHRS operation: ±10º bank and ±5º pitch
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