HAZARD ALERT: Tethered felling machine rollover

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Background:
A felling machine was travelling back up the same path he came down on, towards the tehtering machine, bunching trees as he went.
At the time of the incident he was parked on, or near, a rocky outcrop and was moving wind thrown trees out of the way.
As he slewed the felling head around the left side track lost traction, which caused the right track to lift off the ground. This in turn caused the felling machine to start tipping over.
The operator hit the control to get the tethering machine to increase the tethering rope tension, which momentarily held the felling machine but because it was at such a high angle it continued to tip, then rolled onto its roof, where it cam to a stop.
The operator exited the machine, uninjured, through the main door.

For the full hazard alert, and learnings from this incident, click here