Investigation Report
Failure of lifeboat winch on ro-ro passenger ferry P&OSL Calais and behaviour of self-lifting sprag clutch
Failure of lifeboat winch on ro-ro passenger ferry P&OSL Calais and behaviour of self-lifting sprag clutch
- MAIB
- Investigation Report
- Unknown
- Evacuation, Escape and RescueMachinery and Equipment
- Mechanical failure
- Inspection and maintenanceLaboratory researchLifting operations
- LifeboatWinch
- Functional testingOperating and work procedures
- Marine industry
- LaboratoryPort and quaysideVessel
Summary
Investigates involuntary lowering of a lifeboat on P&OSL Calais and related self-lifting sprag clutch failures. Shipboard measurements and laboratory rig tests examine deceleration, lubricant grade and oil level. Incorrect lubricant was the probable cause of the Calais failure, with ambiguous maintenance instructions contributing. The report discusses similar incidents and vessel-specific lubrication instructions.
Classifications: Mechanical failure; equipment failure.
Classifications: Inspection and maintenance; asset inspection; equipment maintenance.
Classifications: Laboratory research.
Classifications: Lifting operations; load lifting; hoisting.
Classifications: Lifeboat; survival craft.
Classifications: Winch; winches.
Classifications: Functional testing; function test.
Classifications: Operating and work procedures.
Classifications: Marine industry; shipping industry; maritime sector.
Classifications: Laboratory.
Classifications: Port and quayside; quayside; harbour; harbor.
Classifications: Vessel; aboard ship; onboard vessel.
Themes: evacuation, escape and rescue, machinery and equipment.