A SALT LAKE MAN -- WHO WAS PILOTING A GLIDER PLANE, WEST OF EAGLE MOUNTAIN, SUNDAY -- WAS KILLED IN A CRASH, AT CEDAR VALLEY AIRPORT.

UTAH COUNTY SHERIFF'S SARGEANT COLE CHRISTENSEN SAYS, JEFF KNELL, 60, WAS AN EXPERIENCED FLYER AND WAS FAMILIAR WITH THE AIRPORT.

WITNESSES SAY KNELL APPEARED TO HAVE SOME IN-FLIGHT PROBLEMS, JUST BEFORE THE FATAL CRASH.

AUTHORITIES ARE CONTINUING TO INVESTIGATE THE CAUSE.