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Sideboom Stick Collapse


An operator started a sideboom to warm it up, locked out the sideboom, and left it running after putting an umbrella on the seat. However, the bolts on the lockout mechanism were loose, and the lockout mechanism failed due to the position of the umbrella. Half an hour later, a crew observed the load line slowly spooling in, causing the stick to break and the stick, hook and blocks to fall into the cab.