In article ,
Jack Allison wrote:

The GNS-430 was sent off to Garmin for AD compliance and a
hardware/software upgrade. Turns out there's an AD on the GPS that had
not been done the last three annuals. AD work is free but the
hardware/software upgrades need to be done at the same time. So, it's
really not free....oh well. Cost: .75 AMU.

The long awaited, WAAS upgrade?