Why doesn’t BasedAircraft.com and the FAA’s Form 5010-1 report have the same values for based aircraft?
More than likely, the airport hasn’t been inspected in the last year and the airport hasn’t confirmed their counts in BasedAircraft.com after changes were made to the aircraft list. In addition to those possibilities, the Form 5010-1 data is published by the FAA on a 56-day cycle, with a cut-off date about 45 days before the publish date, so this factor alone results in a delay of a few weeks between the submittal and the time that it appears in the published data.
