Investigation Report
Crane Boom Fell During Boom Motor Seal Replacement
01-21-2004 03:14 G05000 MI/622 Crane Boom
- BSEE
- Investigation Report
- Unknown
- Dropped objects
- Electrical isolationInspection and maintenance
- Crane
- Operating and work proceduresPositive retention and reliable securing
- Upstream oil and gas
- Offshore installation
Summary
Investigation of a crane boom falling during boom motor seal replacement on a mobile offshore drilling unit. Removing the integrated motor and brake left the boom unsupported; it struck a liquid nitrogen tank without rupturing it. Recommendations address manufacturer instructions, boom support, load removal and subsequent electrical isolation.
Classifications: Dropped objects; falling objects; DROPS.
Classifications: Electrical isolation; electrical lockout.
Classifications: Inspection and maintenance; asset inspection; equipment maintenance.
Classifications: Crane; cranes.
Classifications: Operating and work procedures.
Classifications: Positive retention and reliable securing.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.
Classifications: Offshore installation; offshore platform; offshore rig.