[fingpilot]

After several crashes where the aircraft was cleared to XXX (say), it was 'discovered' that a lot of airports shared an ident with a VOR radio beacon ident that was not co-located. Meaning the VOR (radio beacon) that was the foundation for that airports' approaches was not physically located on the airport.

Of course, the clearance to the (shared) ident (fix) was indistinguihable for the airport or the beacon. Had been OK for years (most guys asked which). Along comes Flight Management Systems that were too smart to ask.

Example;

XXX VOR is located on a hill 5 miles from an airport, but 2500 feet higher elevation. Pilot recieves clearance to XXX, and sets VOR for nav, and selects passage over XXX at airport elevation. Crash was always located at the radio beacon hill at airport elevation.

Since several of those, all off-airport VOR's are now idented differently. Was a wild time there, while all of the databases and charts were changed and integrated.