GH-3100
Installation & Operation Manual
Page 4-4
Maintenance
TP-559
March 30, 2017
Revision K
Table 4-2: Fault List
SYMPTOM
CORRECTIVE ACTION
Erroneous Pitch or Roll indications.
1. Perform a fast erect.
•
If fast erect does not correct problem; recycle power to
GH indicator. (Ensure A/C is not moved during the
alignment period).
Constant red X observed in air data
display on GH indicator.
1. Check for valid ARINC 429 data from air data computer.
•
If valid contact L3 Aviation Products Customer service.
•
If no ARINC 429 data is present, check for correct
input voltage to the air data computer.
•
If air data computer input voltage is ok, check
continuity between GH indicator and air data computer.
•
If air data computer input voltage is missing, Check
breakers.
2. Replacement of air data computer may be required.
Contact L3 Aviation Products Customer service before
removal.
Momentary view of red X observed in
air data display on GH indicator.
1. Contact L3 Aviation Products Customer service.
