Safety Flash
NTSB: Dangerous engine failure – improper torquing
NTSB: Dangerous engine failure – improper torquing
- IMCA
- Safety Flash
- IMCA SF 08/22
- Hot Work and FireInspection and MaintenanceMachinery and Equipment
- FireMechanical failure
- Inspection and maintenance
- Hand toolsRotating machinery
- Fire protectionOperating and work procedures
- Marine industry
- Vessel
Summary
A ferry engine failed during a post-maintenance sea trial in Puget Sound, ejecting components and causing an engine-room fire. The NTSB identified insufficient tightening of a connecting-rod bolt during overhaul as the probable cause. The flash describes successful fire containment and recommends calibrated torque tools, manufacturer guidance and verification of tightening requirements.
Classifications: Fire; fire safety.
Classifications: Mechanical failure; equipment failure.
Classifications: Inspection and maintenance; asset inspection; equipment maintenance.
Classifications: Hand tools; hand-held tools; handheld tools.
Classifications: Rotating machinery; rotating equipment.
Classifications: Fire protection; fire suppression; fire detection.
Classifications: Operating and work procedures.
Classifications: Marine industry; shipping industry; maritime sector.
Classifications: Vessel; aboard ship; onboard vessel.
Summary
The National Transportation Safety Board of the United States (NTSB) has published Marine Investigation Report 22/06 relating to a Diesel generator engine failure.
IMCA SF 08/22. Themes: hot work and fire, inspection and maintenance, machinery and equipment.