Safety Flash
Exhaust valve cage assembly blow-out
Exhaust valve cage assembly blow-out
- IMCA
- Safety Flash
- IMCA SF 07/04
- Competence and TrainingInspection and MaintenanceMachinery and Equipment
- Line of fireMechanical failure
- Inspection and maintenance
- Rotating machineryValve
- Competence and trainingOperating and work procedures
- Marine industry
- Vessel
Summary
A vessel’s exhaust valve cage assembly was ejected from its main engine, narrowly missing an engineer. Investigation attributed the incident to seawater ingress through a failed charge air cooler tube and ineffective drains and checks. Preventative actions included larger drain valves, clearing devices and improved watchkeeping inspections, with additional familiarisation and procedure recommendations.
Classifications: Line of fire; struck-by hazards.
Classifications: Mechanical failure; equipment failure.
Classifications: Inspection and maintenance; asset inspection; equipment maintenance.
Classifications: Rotating machinery; rotating equipment.
Classifications: Valve; valves.
Classifications: Competence and training; competency assurance; safety training.
Classifications: Operating and work procedures.
Classifications: Marine industry; shipping industry; maritime sector.
Classifications: Vessel; aboard ship; onboard vessel.
Summary
Water entering an engine cylinder caused an exhaust valve assembly to eject violently, prompting drainage, inspection and watchkeeping improvements.
IMCA SF 07/04. Themes: competence and training, inspection and maintenance, machinery and equipment.