Why does the airport plate list a VASI that does not exist? I have a small but quite busy GA (General Aviation) airport I operate out of that gets over 140,000 of operations per year.  It's a popular GA destination, has an active school, and the area schools use it as a great short, narrow, practice runway. The AFD (Airport/Facility Directory) entry for the airport lists the runway as having a Tri Color VASI (Visual Approach Slope Indicator) at each end.  It doesn't exist.  As far as I've gathered it might have existed 20 years ago.  

How does an oversight like this exist for such an extended period of time?

Is this something that should be reported?

The instrument approach plate lists the VASI as well, but it's never been NOTAM'd out of service.  Does this create a hazard to potential IFR traffic?
How does an oversight like this exist for such an extended period of time?


Because it doesn't get reported. 


  Is this something that should be reported?


Yes, it should be reported, otherwise this oversight will exist for an extended period of time. 

This dAFD website contains a link that should be followed to [r]eport any A/FD errors or changes. Somewhere down those links you'll find plethora of forms and rather confusing texts which seem not really helpful when you want to report a missing VASI. That brings us back to the answer on your first question.



Update:

In the comments, Kevin Cathcart pointed out the Aeronautical Data Inquiries form which is the appropriate form to flag the problem. Alternatively you can contact the NFDC (National Flight Data Center) via phone at 1-(866) 295-8236.




  Does this create a hazard to potential IFR traffic?


Whether it is a potential hazard depends mainly on the presence of other source of vertical guidance. Is there an ILS / gideslope active? No vertical guidance at all is a safety risk in low visibility conditions.