During a routine pre-shift inspection, a crane operator discovers a wire rope sling with a section showing six broken wires in a single strand over a length of ten rope diameters. According to CSA Z150, what action should the operator take?

Question: During a routine pre-shift inspection, a crane operator discovers a wire rope sling with a section showing six broken wires in a single strand over a length of ten rope diameters. According to CSA Z150, what action should the operator take?

Answer options:

• Mark the sling for closer monitoring during the shift.
• Only use it for light loads, well below its WLL. ✅ Immediately remove the sling from service.
• Report it to the supervisor at the end of the day.

Correct answer: Immediately remove the sling from service.

Explanation: CSA Z150 mandates that a wire rope sling must be immediately removed from service if there are six randomly distributed broken wires in one rope lay length or three broken wires in one strand in one lay length. This constitutes a critical defect.