• Published: 24 Jul 2012
  • Incident ID: 3443

Sudden Slewing of Crane Boom Dislodges Load

Cause & Consequence

  • Collapse, overturn or failure of lifting equipment
Incident Consequence

Incident Location

Drilling unit

Incident Activity

Lifting, crane, rigging, deck operations

Lessons Identified


  • Spring loaded latch was easily dislodged due to the swing of the pennant.
  • Change of direction of the crane resulted in the pennant doubling back on itself.
  • The crane operator was new to the position and tried to correct the swinging of the pennant.
  • His action resulted in the pennant doubling back against itself and slipping past the hook latch.

Incident Recommendations

CORRECTIVE ACTIONS: To address this incident, this company did the following:

  • Starboard and port crane hooks have been changed out for locking mechanism.
  • A locking mechanism was fabricated and attached to the aft crane to prevent the pennant from becoming detached (moused).
  • All crane operators have been instructed to ensure that the locking mechanism is in place prior to any lifts occurring.

Rate this alert

Average Rating

Latest Alerts & Moments

Our searchable catalogue of hundreds of Safety Alerts and Safety Moments are all designed as learning resources that can help improve workplace safety.