Dennis D. Schaffer was fixing a "malfunctioning unit" on a grain bin at his Main Street property around 10 a.m. when he slipped, said the Lehigh County Coroner's Office.
Schaffer fell 34 feet to the ground and was pronounced dead on-scene by 11 a.m., the coroner said.
His cause of death was multiple blunt-force traumatic injuries due to a fall and his manner of death was accidental, authorities added.
Upper Macungie police are investigating Schaffer's death.
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