Ultralight Flight Park Limitations
Answered By AOPA
In my search, the definition and scope of Ultralight Flight Parks is thin. There is scarcely any mention of them across the Aeronautical Chart Users Guide (symbology only), FARs, or AIM. What is their purpose of being called out separate from a regular airport? Are they available exclusively to ultralight aircraft? If so, what is the source document limiting their scope? There is an advisory circular (AC 103-6) that talks about establishing one, but provides little to no detail about scope of operations.

Example: I want to fly my Cessna 180 to 3H5, Erie Airpark, in Illinois. It is an Ultralight Flight Park listed as open to the public. It sports a 2,000' x 200' grass runway. Am I prohibited from landing there because my Cessna 180 isn't an ultralight? There are public general aviation airports with runways shorter/narrower. Aside from the name, what controls the type of operation at an Ultralight Flight Park? I can't seem to find one. 
3 Replies
The FAA does not decide who may land at any particular airport.  In theory, you can, unless otherwise published by the FAA, land anywhere even if it's not an airport (notwithstanding the regulatory prohibitions on creating hazards to persons/property on the surface -- see Administrator v. Egger for an example).  That's up to the airport/property owner, who for airports listed with the FAA submits those restrictions to the FAA for publication in the Airport/Facility Directory section of the Chart Supplement ("green book").  In the case of 3H5, there are no such restrictions published, so it's open to public use.  If you have any doubts, call the Airport Manager at the number listed in the A/FD entry.  Also, if an airport is restricted to private use, there will be a (Pvt) printed above the airport name on the sectional chart, along with an R inside the airport circle mark, as there is for Franks airport 4 miles northeast of 3H5.

That said, you might want to check your aircraft insurance policy, as those sometimes include restrictions on where you may land.  FWIW, I checked my policy and can't find any such limiting language.
Yes, this is the AC that I referenced in my original post. It is so hilariously outdated (in it's reference to things like Terminal Control Areas!) and does not address any kind of aircraft-type operating limitations to an Ultralight Flight Park. I'm considering submitting this question to my FSDO.