Garmin G1000 Nxi System Maintenance Manual page 326

11. The PFD display advises the operator when to turn the aircraft, when to stop, and when
to turn again.
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.
Thus, it may sometimes be required to dwell at a station after a countdown
restart. A maximum of 30 stations is allowed for the entire calibration
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 AHRS/GSU ADAHRS then enters its normal operational mode.
Press the ENT button on the PFD to conclude this procedure.
15. Repeat steps 7 through 14 for GSU/GRS 2.
G1000 NXi System Maintenance Manual
King Air 300 Series
190-00716-N1
NOTE
NOTE
Page 313
Revision 1