(2022) Service Advisory 2147 Rev B: Occasional blanking of the map when receiving FIS-B NEXRAD data

REVISION B:

Added Resolution

PRODUCTS AFFECTED:

The following G1000 systems are affected:

• G1000 systems with GDU 12.00-15.xx software interfaced to a GTX 345(R)/GDL 90 FIS-B data
• G1000 systems with GDU 12.00-14.xx software interfaced to a GDL 88 FIS-B data

ISSUE:

In some cases, when the system is receiving large amounts of FIS-B NEXRAD data, the display map will blank/flash. Some CAS messages also flash, annunciating a momentary loss of input from other units and systems.

NOTE
This occurs regardless of whether FIS-B NEXRAD data is being displayed on the map or not.

This issue is more likely to occur in Alaska, since the amount of data received has increased due to the increase in “look ahead” range in Alaska. This issue will happen every time an update to the NEXRAD data is received which is approximately every 2 minutes.

ACTION:

Disable FIS-B data when operating in regions where the system regularly receives large amounts of FIS-B NEXRAD data.

RESOLUTION:

This has been fixed in GTX 3X5(R) Main Software Version 2.80 and ADS-B Software Version 3.40. Refer to Garmin STC Service Bulletin 22104.