4728th Air Defense Group

The 4728th Air Defense Group is a discontinued United States Air Force organization. Its last assignment was with the New York Air Defense Sector at Dover Air Force Base, Delaware, where it was last active in 1958. The group was formed to provide a single command and support organization for the two fighter interceptor squadrons of Air Defense Command (ADC), that were tenants at Griffiss, a Military Air Transport Service (MATS) base. It was also assigned a maintenance squadron to perform aircraft maintenance. It was discontinued after the 46th Fighter-Interceptor Squadron inactivated in 1958, leaving only a single fighter squadron at Griffiss.

History
The group was established to provide a headquarters for Air Defense Command (ADC) Fighter-Interceptor Squadrons (FIS) stationed at Dover AFB, a Military Air Transport Service base, whose 1607th Air Base Group acted as host base organization. It was assigned the 46th FIS, flying Lockheed F-94 Starfire aircraft and 98th FIS, flying Northrop F-89 Scorpion aircraft as its operational squadrons to carry out air defense of the Middle Atlantic Area of the United States. These squadrons were already stationed at Dover and had been assigned to the New York Air Defense Sector. In August, maintenance for the two squadrons was combined in the 604th Consolidated Aircraft Maintenance Squadron (CAMS), which was activated at Dover. The 98th FIS converted to newer model F-89s in the fall of 1957. The group was discontinued when the 46th FIS was inactivated, leaving only a single operational ADC squadron at Dover. The 604th CAMS was also inactivated, while the 98th FIS was then assigned directly to the New York Air Defense Sector.

Lineage

 * Designated and organized as: 4728th Air Defense Group on 8 February 1957
 * Discontinued on 1 July 1958

Assignments

 * New York Air Defense Sector, 8 February 1957 – 1 July 1958

Stations

 * Dover AFB, Delaware, 8 February 1957 – 1 July 1958

Components

 * 46th Fighter-Interceptor Squadron, 8 February 1957 – 1 July 1958
 * 98th Fighter-Interceptor Squadron, 8 February 1957 – 1 July 1958
 * 604th Consolidated Aircraft Maintenance Squadron, 8 August 1957 - 1 July 1958

Aircraft

 * F-89H 1957
 * F-89J 1957-1958
 * F-94C 1957-1958