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09-30-2021, 04:24 PM #1GPS vs. Yaw Damper
What became of the issue with the Yaw damper and other systems failing with the loss of GPS signal?
GENOT 7110.711 EMB-300 (faa.gov) -
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09-30-2021, 09:14 PM #2See FOL PHE505-006/16
When GPS signal is not available, the AHRS 1 FAULT and AHRS 2 FAULT CAS messages will be displayed simultaneously, indicating that both AHRS are operating in a degraded mode. This is different than an AHRS FAILURE, where the AHRS system becomes inoperative.
In case AHRS 1 FAULT and AHRS 2 FAULT are displayed simultaneously, maintaining a high airspeed increases the chances of a miscompare between AHRS units. Thus, pilot action may be required to reduce the airspeed in accordance with the related QRH procedure (Airspeed – MAX 240 KIAS/0.63 Mach) to avoid the AHRS 1 and AHRS 2 miscompare.
Observing this speed schedule ensures the normal operation of the airplane.
The following avionics loads improve aircraft ventral rudder system availability in a situation of AHRS miscompare:
G1000 (9X) - avionics load version 92.00
G3000 (1X+) - avionics load version 18.00
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