Narrative:

Aircraft X was in right closed traffic at caldwell airport (cdw) when a VFR target came up just south of lincoln airport (N07) and was climbing. The unknown aircraft was almost 3 miles into my airspace. At this time aircraft X was approaching right base when a traffic alert was given and aircraft X started their turn to the base.arrivals and departures out of N07 almost always violate class delta airspace with no two way communications. I recommend that all aircraft call cdw tower when arriving or departing N07. This way traffic inbound and outbound of cdw and N07 can receive safe and timely traffic calls.

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Original NASA ASRS Text

Title: CDW Tower Controllers reported traffic off of nearby N07 airport entered Class D without communications; which conflicted with ATC controlled pattern traffic.

Narrative: Aircraft X was in right closed traffic at Caldwell Airport (CDW) when a VFR target came up just south of Lincoln Airport (N07) and was climbing. The unknown aircraft was almost 3 miles into my airspace. At this time Aircraft X was approaching right base when a traffic alert was given and Aircraft X started their turn to the base.Arrivals and departures out of N07 almost always violate class Delta airspace with no two way communications. I recommend that all aircraft call CDW Tower when arriving or departing N07. This way traffic inbound and outbound of CDW and N07 can receive safe and timely traffic calls.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.