Maintenance Manual
190-02472-02
G3X Touch EFIS Part 23 AML STC
Revision 2
Page 40
2. The ADAHRS is unable to compute valid attitude information due to insufficient or invalid sensor
information being provided.
Figure 5-5 – Attitude Failure Indication
If the attitude is failed and shows a Red-X condition, follow the troubleshooting steps in the Section 5.1. If
this does not resolve the issue, use guidance in Table 5-6, before gathering answers to the following
questions. This information may be helpful to the customer, the avionics dealer, or to Garmin Aviation
Product Support in troubleshooting the failure:
1. What specifically was the nature of the failure? Was it a Red-X of only heading, only pitch/roll, or
both?
2. If there was a Red-X of pitch or roll information, did the PFD display the "ADAHRS Align: Keep
Wings Level" message (which is indicative of an ADAHRS reset), or the "Attitude Fail" message
(which is indicative of either ADAHRS invalidating its output, or a communication path failure)?
3. What exactly was the aircraft doing in the two minutes that preceded the failure (taxing on the
ground, flying straight-and-level flight, turning, climbing, etc.)? If the problem occurred on the ground,
was it within 100 feet of a hangar using GPS repeaters?
4. How long did the failure last? Was it brief or sustained? Was it repetitive in nature? If it was
repetitive, about how many times did it happen? Did it happen on more than one day?
5. Was the problem correlated with a specific maneuver or a specific geographic area?
6. Can the problem be repeated reliably?
7. Were any of the following message advisory alerts observed on the display or messages field within
an hour of the occurrence of the problem?
ADAHRS not receiving airspeed
ADAHRS not receiving any GPS information
ADAHRS magnetic-field model out of date
ADAHRS extended operation in no-GPS mode
8. Did the onset of the problem occur shortly after a software upload to the G3X Touch system, or
shortly after a repeat of the magnetometer calibration procedure? Were there any GPS Alert
messages or loss of position lock?
