Instruction Manual

Page 4-28 G1000 / GFC 700 System Maintenance Manual - 300/B300 Series King Air
Revision 4 190-00716-01
4.12 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 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. 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. Re-select pilot side by pressing XFR key on the mode controller (changes active GIA back to GIA 1).
11. Hold the control yoke in the center position and center the pitch trim wheel.
12. Press the Go Around button on the throttle and engage the autopilot. Apply a forward load on the
control yoke. Verify that the pitch trim wheel rotates in the UP direction.
13. Disconnect the autopilot by pressing the AP DISC button.
14. Hold the control yoke in the forward position and center the pitch trim wheel.
15. Engage the autopilot, maintain the control yoke in the forward position and keep the pitch-trim wheel
from rotating for approximately five seconds.
16. Quickly release the trim wheel and verify that the red PTRM annunciator is displayed on both PFD 1
and PFD 2.
17. Disengage the autopilot and use the pitch-trim switch (or the pitch-trim wheel) to trim full down.
18. Hold the control yoke in the full forward position.
19. Engage the autopilot, apply firm aft pressure on the control yoke for approximately 10 seconds,
allowing the pitch-trim wheel to move freely. Verify that the amber ELE↓ annunciator is displayed
on both PFD 1 and PFD 2.
20. Disengage the autopilot and use the pitch-trim switch (or the pitch-trim wheel) to trim full up.
21. Move the control yoke to the full aft position and hold.
22. Press the Go Around button on the throttle and engage the autopilot. Apply firm forward pressure on
the control yoke for approximately 10 seconds, allowing the pitch-trim wheel to move freely. Verify
that the amber ELE↑ annunciator is displayed on both PFD 1 and PFD 2.
23. Disengage the autopilot.
NOTE
If the ELE annunciation appears during any of the following steps, reset the trim wheel
and repeat the test step.
24. Use the pitch-trim switch (or the pitch-trim wheel) to trim full down.
25. Hold the elevator in the neutral position, press the HDG and ALT buttons on the mode controller and
center the heading bug.
26. Engage the autopilot and turn the heading knob to set the heading bug to the right of center. Hold the
control yoke centered for approximately 10 seconds. Verify that the amber AIL→ annunciator is
displayed on both PFD 1 and PFD 2.