FORT ATKINSON, WIS., NOV. 16 -- A twin-engine turboprop en route from Chicago's Meigs Field to Baraboo, Wis., slammed into a wooded hillside shortly before 8:30 a.m, killing all eight people aboard, authorities said.

The pilot of the King Air 200 model, a 10-seater made by Beech Aircraft Corp., "was on his descent toward Baraboo when he radioed 'Mayday, mayday' several times," Federal Aviation Administration spokesman Mort Edelstein said.

"We were in the shop, we heard a whiz and a bang and walked outside. All we could see was a stream of smoke, and we could smell raw fuel oil in the air.

"About 15 minutes later, we heard a big explosion," said Tom Beane, who owns the farmland where the plane crashed, 23 miles southeast of Madison.

"There were parts of the plane all over, I'd say in a circle a thousand feet around. And there was a hole big enough to park a car in," he said.

One engine was found a short distance away. Another engine hit some nearby woods and one wing was visible. Bits of torn metal and paper littered the area.

Officials said the passengers included printing company employes attending a Chicago convention.

Passengers included representatives of Danbury Printing Co. of Danbury, Conn., and Webtech Inc. of Effingham, Ill., officials said. The victims' identities were being withheld until relatives could be notified.

However, the family of Cecil J. Previdi, president of Danbury Printing, said in a telephone interview he was among the victims.

Light rain was falling, and visibility was 8 miles when the plane went down, Edelstein said.

The plane was registered to Danpar Aviation of Danbury, and a company spokesman said it was on a chartered flight. cording to directory assistance.

FAA investigators were on the way to the crash scene, Edelstein said.