An Army Chinook helicopter Saturday found the body of a climber on Mount Rainier after a two-day search that began with the discovery of his climbing partner's frozen corpse.

The helicopter's crew spotted the body of 26-year-old Peter Derdowski of Stateline, Nev., around noon at the 9,400-foot mark of Carbon Glacier, on the mountain's north side, said Cy Hentges, Mount Rainier National Park spokesman.Hentges said a crew of six to eight climbers would be flown in to retrieve the body, which will be brought to the Pierce County medical examiner's office in Tacoma for an autopsy.

"He apparently slipped off Liberty Ridge as he tried to come back down," Hentges said. "He apparently died of the fall."

Derkdowski's climbing partner, 33-year-old Richard Mooney of South Lake Tahoe, Calif., was found dead below Liberty Cap on the 14,410-foot mountain Thursday by two others in the climbing party.

Larry Duin, 26, and Steve Newell, 27, both of South Lake Tahoe, came upon Mooney's body Thursday at the 13,700-foot level and descended to alert authorities, who dispatched 30 searchers and three helicopters to look for Derdowski.

Derdowski apparently had left Mooney to find the two other climbers, Hentges said.

Mooney's body also was taken to the county medical examiner.

Derdowski is survived by a wife and a 9-month old son. Mooney was single.

The deaths brought to 11 the number of men killed while climbing Mount Rainier since 1979.