User Guide

34 Garmin G1000 Pilot’s Training Guide Instructor’s Reference 190-00368-06 Rev. A
6. During a cross country flight, an AHRS failure occurs (failure indicated by a red “X” over the
Attitude Indicator). Note: the aircraft is equipped with a GFC 700 AFCS.
• Aside from the backup Attitude Indicator, what items can be used to ensure safe flight?
• ARTCC
• Magnetic compass
• DTK and TRK data fields at the top of the PFD
• Map overlay
• What are the next actions that should be taken concerning the completion of the flight?
Note that depending on the circumstances, the action items may require completion in a
different order.
1. Notify ARTCC both of the failure and of the need to deviate. Do not hesitate to ask
for no-gyro turns if the aircraft must be hand-flown.
2. Based on the information provided by ARTCC, set up a direct-to GPS navigation to
the nearest VFR airport or to a nearby airport with the next-best conditions.
3. Check the DTK and TRK data fields at the top of the PFD to help determine whether
the aircraft is in straight flight or in a bank angle and use the magnetic (“whiskey”)
compass to perform cross-checks against the DTK and TRK data. Note that this is
the type of situation in which having an active GPS NAV as an additional cross-
check tool is important.
4. Use a map display to verify heading changes.
• When the AHRS fails, what is the other piece of information that is lost besides attitude?
An AHRS failure also causes power loss to the Magnetometer, hence magnetic heading
indications are no longer displayed on the HSI and a red “X” appears over the current
heading indication. Use the DTK and TRK numbers from the GPS for direction to the
runway, and perform cross-checks against the aircraft’s magnetic (“whiskey”) compass.