Garmin G1000 System Maintenance Manual page 251

12. Upon instruction to turn, taxi the aircraft in a right turn. After approximately 25° to 30° of turn from
the last heading, the PFD display advises the operator to stop the aircraft.
Due to the difficulties in executing smooth, accurate turns the PFD may incorrectly
interpret a station and instruct to "HOLD POSITION" prior to full completion of a 30°
turn. If this scenario is encountered, it is best for the operator to ignore the "HOLD
POSITION" command and instead use outside references to complete the approximate
30° turn. Instead of using the PFD instruction to turn as a real-time indication of when to
turn, simply judge the 30° (±5°) turn increments of the aircraft by using the compass rose
radials. Dwelling at these 30° increments for the time recommended by the PFD should
result in successful calibration.
13. The PFD guides the operator to dwell at multiple headings around a complete circle.
Due to high winds or excessive airframe vibration, the operator may encounter a
condition where the PFD restarts the 18-second countdown without full completion of the
previous countdown. If this is encountered more than once for a given station, the
operator should begin turning to the next station (approximately 30°). A minimum of 2
successful stations per quadrant is required, where a successful station is a full 18-second
countdown followed by instruction to move. Ensure that at least 2 stations per quadrant
are completed.
countdown restart.
procedure. If too many countdown restarts are encountered, the calibration will fail with
the message, "TOO MANY STATIONS."
14. Repeat the turn-and-stop process until the PFD advises that a successful calibration is complete.
The GRS 77 AHRS then enters its normal operational mode. Press the ENT button on the PFD to
conclude this procedure.
15. Repeat steps 4 through 14 for GRS 77 #2.
G1000 / GFC 700 System Maintenance Manual - 300/B300 Series King Air
190-00716-01
NOTE
NOTE
Thus, it may sometimes be required to dwell at a station after a
A maximum of 30 stations is allowed for the entire calibration
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