Utility aircraft

A utility aircraft is a general-purpose light aircraft or helicopter, usually used for transporting people or freight, but also for other duties when more specialized aircraft are not required or available.

The term can also refer to an aircraft certified under American, Canadian, European or Australian regulations as a Utility Category Aircraft, which indicates that it is permitted to conduct limited aerobatics. The approved maneuvers include chandelles, lazy eights, spins and steep turns over 60° of bank.

In the United States, military utility aircraft are given the prefix U in their designations.

...
Wikipedia