Explained: Local warehouse owner among the 6 people killed in Wisconsin plane crash

A plane owned by longtime pilot Ron Riek crashed in Wisconsin, killing him and five others.

NTSB

National Transportation Safety Board, the U.S. agency investigating the crash.

Piper PA-46 Malibu

The type of six-seat, single-engine plane involved in the crash.

Icing

Buildup of ice on an aircraft's wings, which can impair its ability to stay airborne.

Single-engine plane

An aircraft powered by only one engine, as opposed to multi-engine aircraft.

Air traffic controller

A person who directs aircraft on the ground and in the air, communicating with pilots during flight.