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Aviation Alerts and Advisories

Service Advisory 2017: GNS 480 (CNX 80) GPS Date

PRODUCTS AFFECTED:

Garmin GNS 480 (CNX 80) navigators are affected.

ISSUE:

Beginning August 16, 2020, GNS 480 units may report a GPS date that is 20 years or more in error under the following situations:

  1. If the GPS receiver has not acquired a 3D navigation solution within the last 128 weeks
  2. If a Master GPS Reset is performed without setting the correct date

An incorrect GPS date may result in all installed databases with effective dates shown as not yet effective.

ACTION:

If the GNS 480 reports an incorrect date, do the procedure outlined in the attached Service Advisory while the GNS 480’s GPS antenna has a clear view of the sky.

Service Advisory 2017 Rev A