It directly affects the serviceability of the GPS/RNAV unit for its intended purpose.
The DBase expires on a known date each cycle.
Our system is simply to endorse the MR "GPS DBase expires on "ddmmyy"" and clear it when the dbase is renewed by entering "DBase 0908 installed"
This of course prompts another entry for the new expiry date, etc.
Dunno about CAOs but CASA airworthiness likes it
