Investigation Report
Rope-Access Technician Descended Uncontrollably During Caisson Inspection
05-31-2023 0900 G26313 GC 468 Other Lifting, Evac, LTA>3 days
- BSEE
- Investigation Report
- Unknown
- Falls from heightHuman factors
- Inspection and maintenanceWorking at height
- Fall protection equipment
- Competence and trainingEvacuation, escape and rescueFunctional testingOperational supervision
Summary
Investigation of a rope-access technician’s uncontrolled 90-foot descent during caisson inspection at Stampede. Incorrect descender threading and defeat of the backup device accompanied a leg injury from striking a support clamp. Findings address omitted functional checks, inadequate supervision and training, anchor securing, and deficient rescue planning.
Classifications: Falls from height; fall from height.
Classifications: Human factors; human performance; ergonomics.
Classifications: Inspection and maintenance; asset inspection; equipment maintenance.
Classifications: Working at height; work at height.
Classifications: Fall protection equipment; safety harness; fall arrest equipment.
Classifications: Competence and training; competency assurance; safety training.
Classifications: Evacuation, escape and rescue; EER; escape and rescue.
Classifications: Functional testing; function test.
Classifications: Operational supervision.