G1000 NXi System Maintenance Manual
Page 131
King Air 300 Series
Revision 1
190-00716-N1
•
The autopilot disconnect audio alert (two hi-low tones) sounds
•
A red flashing AP annunciator on PFD 1 and PFD 2
•
Flight director command bars remain in view with autopilot in HDG and ALT
mode
14. Return AHRS 1/ADAHRS 1 to normal attitude and verify that attitude display on PFD 1
displays current aircraft attitude.
15. Use the AFCS mode controller to re-engage autopilot.
16. Slowly rotate AHRS 1/ADAHRS 1 along the longitudinal (roll) axis to a roll attitude of
greater than 5 degrees, verify the following:
•
PFD 2 roll attitude does not change
•
An amber ROL box is annunciated on PFD 1 and PFD 2 adjacent to the roll
scale.
•
Autopilot disconnects at approximately 5° roll miscompare
•
The autopilot disconnect audio alert (two hi-low tones) sounds
•
A red flashing AP annunciator on PFD 1 and PFD 2
•
Flight director command bars remain in view with autopilot in HDG and ALT
mode
17. Return AHRS 1/ADAHRS 1 to normal attitude and verify that attitude display on PFD1
displays current aircraft attitude.
18. Repeat Steps 13 through 17 for AHRS 2/ADAHRS 2. For this test, PFD 1 attitude
should not change and PFD 2 attitude should be used as the AHRS 2/ADAHRS 2
reference.
19. Reinstall AHRS/ADAHRS 1 and 2 units in their racks per Section 6.9.
20. The G1000 Miscompare checks are complete. If no further air data tests are required,
disconnect pitot/static test sets.
Nose Avionics Compartment Fans Operational Check
This procedure will verify that airflow is present from the ported avionics cooling fans to the #1
and #2 GIA units. The fan speed monitoring circuits and annunciations are checked by the
G1000 Cooling Fan Fail Annunciation Check in Section 9.4 and a Visual Inspection of the fan
and its hoses is accomplished in Section 4.4. This check requires the G1000 to be powered on.
1. Gain access to the nose avionics compartment.
2. Disconnect cooling fan hose from the pilot side GIA and verify airflow is present.
3. Reconnect the cooling fan hose to the GIA and secure using MS3367-5-9 cable tie.
4. Repeat Steps 2 through 3 for the copilot side GIA.
5. The Nose Avionics Compartment Fans Operational Check is complete.
Summary of Contents for G1000 NXi
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