Potomac TRACON did clear them to operate in the Class B airspace and stated that KDCA was now an uncontrolled airport. The pilots operated in accordance with the AIM and the controller's instructions. KLGA was an uncontrolled airport when the tower was closed at night, same procedures. Tonight, an airplane inbound to a one of the DC Three uncontrolled airports are cleared for visual approaches and land with a clearance. End of Story.
If the TRACON controller and the watch supervisor did not have that authority, is that the crew's fault?
GF