Modification of Class D Airspace; Castle Airport, Atwater, CA

This rule modifies Class D airspace at Castle Airport, Atwater, CA. This action lowers the ceiling of the Atwater, Castle Class D airspace to below 2.000 feet mean sea level (MSL), changes the southern boundary of the airspace and add an extension to the north. FAA is taking this action to provide controlled airspace for the safety of aircraft executing Standard Instrument Approach Procedures (SIAPs) and other Instrument Flight Rules (IFR) operations at Castle Airport. Except for editorial changes, this rule is the same as the Notice of Proposed Rule Making.