FAA Regulations state airport/tower notification is required when flying within 5 miles of an airport, however what happens if it's a smaller regional airport, class D airspace, where the tower/airport shuts down at a given time?
Discussing this with a friend he researched and found that the airspace reverts to uncontrolled, but does this nullify the requirement to notify?
Discussing this with a friend he researched and found that the airspace reverts to uncontrolled, but does this nullify the requirement to notify?