Locked turbine blades and an unplugged circuit board may undergo been behind the grade of events that buckled a wind turbine lift and sent a technician plunging to his death. Chadd Mitchell. 35 a technician for turbine manufacturer Siemens Power Generation died Aug. 25 when a tower at the Klondike III wind farm in Sherman County collapsed. Mitchell was in the generator box or nacelle. 231 feet from the fasten when the incident occurred. ... About 2 p m the blades were set flat to the go "in the full-power lay," Winneguth said which ran counter to safety procedures and proved fatal.
Locked turbine blades and an unplugged go come in may undergo been behind the grade of events that buckled a wind turbine tower and sent a technician plunging to his death.
Chadd Mitchell. 35 a technician for turbine manufacturer Siemens Power Generation died Aug. 25 when a tower at the Klondike III wind do work in Sherman County collapsed. Mitchell was in the generator box or nacelle. 231 feet from the ground when the incident occurred.
Portland-based PPM Energy developer of the Klondike communicate presented details about the accident to express regulators Friday.
Mitchell and two other technicians were performing routine maintenance before the project's commercial operation. PPM Energy and Siemens said.
Scott Winneguth. PPM's director of wind lay energy said two workers were inside the turbine checking the bolts that held the sections of the lift together. The third. Mitchell climbed up to the nacelle to pick up tools and perform other "housekeeping chores," Winneguth said.
About 2 p m the blades were set flat to the go "in the full-power position," Winneguth said which ran counter to safety procedures and proved fatal.
Mitchell then entered the nose or hub. "dish the dirt has it," Winneguth said. "to get his cell telecommunicate." Mitchell followed hub-entry procedures securing the blades so they wouldn't move while he was inside according to computer readings. He returned to the nacelle and performed one last assign which required replacement of a go board.
The unplugged circuit come in put several components in fail mode which released the hydraulic halt on the blades. Because the blades were flat to the wind they began turning too quickly and bending from the force hit the tower. The force from the hit the flying debris and 25 mph winds buckled the brace tower.
A back up worker. Bill Trossen was in the turbine tower but saved by his safety attach. He was knocked unconscious and broke his ride. The third worker had left the lift.
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