Trim Annunciator Check; Table 4-13, Torque Indication Test Points - Garmin G1000 Nxi System Maintenance Manual

5. On the right hand circuit breaker panel, open the GIA1 (PRI) and GIA1 (SEC) circuit
breakers, and verify the last observed torque indication remains unchanged. Reset the
GIA1 (PRI) and GIA1 (SEC) circuit breakers.
6. Repeat Table 4-13 test for the right engine by injecting a DC voltage into GEA 2 by
connecting the DC power supply to the right engine firewall connector-pins J103-C (HI)
and J103-R (LO).
7. Pull the GIA 2 circuit breaker, and verify the last observed torque indication remains
unchanged. Reset the GIA 2 circuit breaker.
8. Turn off the G1000 system and remove external power from aircraft.
9. Reinstall and safety the left J102 and right J103 engine firewall connectors.

Trim Annunciator Check

This procedure checks the pitch trim (PTRM) annunciation from both GIA 1 and GIA 2 and the
mis-trim AFCS status alerts.
1. Ensure the G1000 is in normal mode, autopilot is not engaged, and the AFCS mode
controller XFR key is selected to the pilot side.
2. Press the left part of the pilot's pitch-trim switch upwards for approximately 10 seconds
and verify that the red PTRM annunciation is displayed on both PFD 1 and PFD 2.
3. Release the switch and wait for the PTRM annunciation to clear.
4. Press the left part of the pilot's pitch-trim switch downwards for approximately 10
seconds and verify that the red PTRM annunciation is displayed on both PFD 1 and PFD
2.
5. Release the switch and wait for the PTRM annunciation to clear.
6. Repeat Steps 2 through 5 for the right part of the pilot's pitch-trim switch.
7. Repeat Steps 2 through 6 for the copilot's pitch-trim switch.
8. Using the AFCS mode controller, select copilot side by pressing the XFR key on the
mode controller (changes active GIA to GIA 2).
9. Repeat Steps 2 through 7 and verify annunciations are displayed on both PFD 1 and
PFD 2.
10. Using the AFCS mode controller, re-select pilot side by pressing XFR key on the mode
controller (changes active GIA back to GIA 1).
11. Hold the control yoke with elevators and ailerons in the neutral positions (control wheel
level and at the mid-point position between full forward and full aft). Position the pitch
trim wheel to 0° degrees.
G1000 NXi System Maintenance Manual
King Air 300 Series
190-00716-N1
Test Point (VDC)
0.000 +/- .02
1.035 +/- .02
1.725 +/- .02
2.300 +/- .02

Table 4-13, Torque Indication Test Points

Torque Indication (%)
0 +/- 2
42 +/- 2
75 +/- 2
100 +/- 2
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